[网络] 硫化铁变色导致内容物污染；硫化铁变色

CNN 2009-11-25

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(51) / 评论(0)

cnn2009年(十一)月

60秒科学:Mercury Fillings Seem Safer over Time

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(105) / 评论(0)

60秒科学

Garlic: The Key to a Long Life?

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(86) / 评论(0)

2016年VOA慢速英语(十二)月

英语听力文摘 English Digest 505、不能不说的秘密

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(51) / 评论(0)

英语听力文摘 English Digest

英语听力文摘 English Digest 70、细菌可除臭?

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(47) / 评论(0)

英语听力文摘 English Digest

早安英文第452期:可别用white和black形容肤色了!

white／fair白皙 medium／whitetolightbrown中等／白色至浅棕 olive／moderatebrown中等棕色 brown／darkbrown深棕色 Skincareislikedieting.Youhavetoinvesttimeandeffort.Thereisnoinstantmiraclecure. 护肤就像是日常饮食。你需要倾

发表于:2019-02-21 / 阅读(105) / 评论(0)

早安英文

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arrive take a decision

beta-adrenergic blocker

biotic succession