protoxylem的用法和样例：

例句

用作名词(n.)

It is found in protoxylem and first metaxylem tracheids and vessels.可在原生木质部和初始后生木质部的管胞和导管中见到。

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Rho Ophiuchi dark cloud is one of the closest star-forming regions to our own solar system. Located near the constellations Scorpius and Ophiuchus, the nebula is about 407 light years away from Earth. The infrared astronomical satellite, now celebra

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国家地理2008年

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Voice 1 Welcome to Spotlight. Im Katy Blake. Voice 2 And Im Christy VanArragon. Spotlight uses a special English method of broadcasting. It is easier for people to understand - no matter where in the world they live. Voice 1 Small, shiny shells. Roun

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环球英语 Spotlight

【突破英文词汇】prot, proto -- first 第一

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突破英文词汇

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发表于:2019-01-03 / 阅读(277) / 评论(0)

2018年VOA慢速英语(五)月

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医务英语

VOA常速英语2007年-Australia's New PM Signs Kyoto Protocol on Clim

By Phil Mercer Sydney 03 December 2007 Kevin Rudd has been sworn in as Australia's new Prime Minister with an agenda of action on climate change and the repeal of unpopular industrial laws. The new government has signed the Kyoto Protocol on climate

发表于:2019-01-25 / 阅读(269) / 评论(0)

VOA常速英语2007年（十二月）

万物简史第437期:小生物的世界(8)

In 2001, a team from Tel Aviv University argued that B. permians were almost identical to a strain of modern bacteria, Bacillus marismortui, found in the Dead Sea. 2001年，以色列特拉维夫大学的一个小组认为，二叠纪芽孢杆菌与一

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万物简史

【英语时差8，16】太阳为什么发光

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发表于:2019-02-23 / 阅读(279) / 评论(0)

英语时差8，16

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The British actor Alan Rickman has died of cancer at the age of 69. In movies, he won fame for his role as Severus Snape in the Harry Potter series and before that in films such as Truly Madly Deeply, Love Actually, Die Hard, Sense and Sensibility an

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学英语单词

Acarus balatus

acidylable

adrar tedjorart pk.

airborne infrared high energy laser

al jifarah(qafarah)

allowance for necessary machine delay

branches to amygdaloid body