连作

continuous cropping的用法和样例：

例句

The allelopathic effect of continuous cropping soil of Panax notoginseng was investigated and its mechanism was revealed initially.摘要探讨三七连作土壤的化感作用，初步揭示三七连作土壤化感作用的机制。
Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping.摘要利用平板培养法对黄瓜连作根系微生物种群连续性变化进行了跟踪研究。

迷你对话学地道口语第15期:遇到麻烦

[00:00:01] I am in hot water now, all the things seem to be blown up. 我现在遇到麻烦了，好像所有的事情多和我作对似的。 [00:09:03] Do not be scared. 别泄气， [00:10:25] Bite the bullet and everything will be right again. 咬紧

发表于:2018-12-03 / 阅读(269) / 评论(0)

迷你对话学地道口语

掌握英语发音第一章第三节

[00:00.00][s],[ ][ ] [00:38.61]sea/sheet/chicken [00:42.66]Exercise One: Word Conparison [00:47.62]Listen to the following words from your tape and repeat. [00:52.98]sip ship sane shane watched washed [01:01.23]lass lash least leashed chin [01:09.09]

发表于:2018-12-03 / 阅读(405) / 评论(0)

掌握英语发音

英语语法：现在完成进行时

现在完成进行时(The Present Perfect Continuous Tense)表示由过去某时持续到现在的动作，由have(has)been+现在分词构成： It has been raining for three hours. 一连下了三个钟头的雨。 She has been working the whole mo

发表于:2018-12-18 / 阅读(271) / 评论(0)

英文语法词汇

英语语法：过去完成进行时

过去完成进行时(The Past Perfect Continuous Tense)：表示过去某时前一直在进行的动作，由had been+现在分词构成： I asked him what he had been doing．我问他一盲在干什么。 He had been working all day and was very

发表于:2018-12-18 / 阅读(270) / 评论(0)

英文语法词汇

纯正英语一分钟-coffee

Scientists and doctors cant make their minds up about coffee. One study says its really bad for us and the next report says its good for us. Ive even read that 10 cups a day is good for our brain. I like a cup of coffee at certain times of the day. I

发表于:2018-12-26 / 阅读(296) / 评论(0)

纯正英语一分钟

美国英语听力80篇3 Lesson48

[00:10.06]Gehrig continued to improve as a player. [00:14.05]By 1924, pitchers for opposing teams were having bad dreams about Lou Gchrig and Babe Ruth. [00:23.04]Ruth hit sixty home runs that year. [00:26.36]Gchrig hit forty seven and won the Americ

发表于:2018-12-26 / 阅读(317) / 评论(0)

美国英语听力80篇

听一分钟英文：Coffee-咖啡

发表于:2018-12-28 / 阅读(289) / 评论(0)

听一分钟英文-C

英语高频词：just用法综述

just在英语中是一个重要的词语，其使用方法也是多种多样的。Just可以用作一个时间表达，用来在一些固定表达中表示某事十分重要，对词语进行强调，并作为only的同义词。本指南可以帮助你

发表于:2019-01-03 / 阅读(270) / 评论(0)

英文语法词汇

The London Tube

Yvonne: This is 6 Minute English, I'm Yvonne Archer and Alice has kindly joined me for today's programme. Hello Alice. Alice: Hi Yvonne. Yvonne: Now Alice, how do you get around London? Alice: Ooh by bus, bicycle and usually the Tube. Yvonne: Aha, an

发表于:2019-01-07 / 阅读(418) / 评论(0)

六分钟英语

UNIT 2 On the Train Lesson 16

[ti:UNIT 2 On the Train Lesson 16] [0:00.641]Unit 2 [0:03.070]On the Train [0:05.053]Lesson 16 [0:07.484]Unit Review [0:09.731]Ⅰ. [0:11.044]Building Your Vocabulary [0:14.048]A. [0:14.982]Fill in the blank with the proper word. [0:17.959]The first

发表于:2019-01-09 / 阅读(384) / 评论(0)

河北教育初中英语（初中起点）七年级下册

UNIT 3 Amazing Animals Lesson 17: People Love Pets!

[ti:UNIT 3 Amazing Animals Lesson 17: People Love Pets!] [0:00.501]UNIT 3 第三单元 [0:01.876]Lessons 17～24 第17~24课 [0:04.543]Amazing Animals 令人惊异的动物 [0:06.544]You Will Learn 你将学到 [0:07.794]Functions 实际应用 [0:08.

发表于:2019-01-09 / 阅读(450) / 评论(0)

河北教育初中英语（初中起点）八年级下册

VOA慢速英语 2007 0911a

This is the VOA Special English Agriculture Report. Strip cropping Nigeria is the world's largest cowpea producer. Cowpeas are also called black-eyed peas. But there is always room for improvement. Recently, before the start of another farming seaso

发表于:2019-01-11 / 阅读(268) / 评论(0)

VOA慢速英语2007年（九）月

小狐外传第69期:戏法

First Mr. Yee did a trick with scarves. 首先易先生用围巾变了一个戏法。 I told you, said Fox. 我说过吧，小狐说。 Then Mr. Yee made his helper vanish. 接着易先生将他的助手变没了。 Ho-hum, said Fox. 哼，小狐说。

发表于:2019-01-29 / 阅读(253) / 评论(0)

小狐外传

WHO Report on Noise

> 28 世界卫生组织关于噪音污染的报道 DATE=3-29-01 TITLE=SCIENCE REPORT - WHO Report on Noise BYLINE=Caty Weaver Start at 59

发表于:2019-01-30 / 阅读(253) / 评论(0)

科技之光

办公英语电话故障

Key Sentences(重点句子) 146．The connection was bad．通话情况很糟。 147．There was a lot of echo and I couldn't hear well．回音太多，我听不清楚。 148．I'll connect you agian．我再为您接通一次。 149．I've just

发表于:2019-02-07 / 阅读(277) / 评论(0)

实用英语

How to Establish New Habits the No-Sweat Way

The chains of habit are generally too small to be felt until they are too strong to be broken. - Samuel Johnson Editors note: This is a guest post from Mary Jaksch of Goodlife Zen. Have you ever had problems establishing a new habit? Maybe I should a

发表于:2019-02-14 / 阅读(347) / 评论(0)

阅读空间

成功是什么？一句话定义成功

Have you ever thought why there are very few great people? I think there is probably only one great person out of 10,000 at best, and most probably much less than that. But why? Most people want to be great, right? Why are there only very few of them

发表于:2019-02-17 / 阅读(361) / 评论(0)

英语美文

成功是什么?

发表于:2019-02-18 / 阅读(294) / 评论(0)

英语美文

托福阅读背景材料：噪音对我们的影响

下面给大家提供一篇关于生活中噪音的影响的托福阅读背景材料，希望能拓宽同学们的阅读面。 I'm grad to see so many of you here. We'vebecome really alarmed over the health center by thenumber of students we are seei

发表于:2019-03-02 / 阅读(352) / 评论(0)

托福英语

电话故障

发表于:2019-03-11 / 阅读(418) / 评论(0)

实用英语

最新学习文章

热门学习文章

热门标签

英语听力 VOA标准英语 VOA 英语歌曲口语听力提高听力材料听力教程英语学习 NPR 英语口语 VOA慢速英语美国国家电台儿童英语 VOA英语小学英语 cnn VOA常速英语标准英语英文歌曲听电影学英语英语单词英文电影慢速英语 CRI 美联社新闻美国有线新闻加州分级澳洲新闻流行歌曲常速英语 ABC新闻快递疯狂英语英语读物听力棚车少年经济学人英语词汇商务英语 VOA双语新闻 BBC 中国电台大学英语 Treasures 加州语文 BBC英语英语听力网站 VOA英语教学词汇万花筒 SSS VOA英语听力 AP 新概念分级英语英语广播听力精选英语播客英文绘本 TED演讲赖世雄英语MP3 CCTV9英语新闻 lesson 英语新闻初中英语学英语英语语法历史上的今天英文广播剧英语游戏原版英语小说英语有声读物书虫英语牛津英语读物访谈录新闻一分钟考研英语英语每日在线听新闻 Us 新概念英语地道英语单词第二册自然百科高中英语 sports 实用英语 MP3听力辛沛沛 ESL英语第一册英语每日一句 unit 新东方 GRE 每日一词 BBC听力

学英语单词

active open

Amathi

arawe

assertion specification language