环硫乙烷;噻丙烷;硫化伸乙基

Agriculture Report - Friends With Benefits, in the Plant World This is the VOA Special English Agriculture Report. Companion planting is the idea that some kinds of plants can help each other grow. Plants that are compatible together generally have s

发表于:2018-12-07 / 阅读(118) / 评论(0) 分类 2012年VOA慢速英语(二)月

I couldn't get over this mess. The federal government is confirming what Joan Glickman of Pompano Beach, Florida suspected all along. Tainted drywall from China is giving off a harmful gas that's turning her air-conditioning wiring black, causing it

发表于:2018-12-20 / 阅读(104) / 评论(0) 分类 cnn2009年(十一)月

Mercury Fillings Seem Safer over Time A study in the journal Chemical Research in Toxicology finds that mercury on the surface of dental fillings slowly turns to an inert sulfide compound, which should keep the mercury from harming the nervous system

发表于:2019-01-02 / 阅读(165) / 评论(0) 分类 60秒科学

This is the VOA Special English Agriculture Report. Companion planting is the idea that when some crops are planted together, they help each other grow. These compatible plants generally have similar needs for nutrients, soil and moisture. Advice fo

发表于:2019-01-11 / 阅读(134) / 评论(0) 分类 VOA慢速英语2009年(八)月

Agriculture Report - Friends With Benefits, in the Plant World 农业报道 - 植物世界的互惠互利 From VOA Learning English, This is the Agriculture Report in Special English. 这里是美国之音慢速英语农业报道。 Companion plantin

发表于:2019-01-12 / 阅读(124) / 评论(0) 分类 2013年VOA慢速英语(三)月

From VOA Learning English, this is the Health Lifestyle report. Garlic is one of the most common cooking ingredients around the world. Many dishes in Europe, Africa, Asia and the Americas use this strong-flavored vegetable. Garlic is similar to other

发表于:2019-01-12 / 阅读(149) / 评论(0) 分类 2016年VOA慢速英语(十二)月

Black Tongues and Stomach Aches Don: Oh, no, Ya?l, I think I'm having a medical emergency. Quick! Call an ambulance. Ya?l: A medical emergency, Don? Are you sure? You look fine to me! D: But I'm not. This morning, I had a terrible stomach ache. And n

发表于:2019-01-26 / 阅读(91) / 评论(0) 分类 英语听力文摘 English Digest

Sewage stinks. But bacteria can make it smell better. Oh, yeah? That's true. Certain forms of bacteria feasting on sewage give off hydrogen sulfide, a really malodorous chemical, and one of several that give sewage its pleasing smell. In general this

发表于:2019-01-26 / 阅读(96) / 评论(0) 分类 英语听力文摘 English Digest

Chemical Oracle 神秘的阿波罗神庙 If youre planning a trip to Greece in the future, youll want to schedule a visit to the temple of Apollo at Delphi. This famous temple was the home to the Pythia, a specially chosen and trained woman who, acco

发表于:2019-02-16 / 阅读(110) / 评论(0) 分类 英语听力文摘 English Digest

If you're planning a trip to Greece in the future, you'll want to schedule a visit to the temple of Apollo at Delphi. This famous temple was the home of the Pythia, a specially chosen and trained woman who according to legend channeled the voice and

发表于:2019-02-23 / 阅读(121) / 评论(0) 分类 英语时差8,16
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