每日背誦第一期21

所屬教程:每日背誦第一期

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Although traveling dust storms are nothing new, the dust now often contains chemical or metallic substances that contribute to respiratory illnesses and damage the environment. At present, a group of researchers in Asia is studying aerosol particles and their effects on the environment—and they have plenty of dust to work with.

雖然移動的沙塵暴沒什么稀奇，但現(xiàn)在那些沙塵通常含有引起呼吸道疾病和破壞環(huán)境的化學或金屬物質?，F(xiàn)在亞洲有一批研究人員正在研究懸浮顆粒及其對環(huán)境的影響──他們要研究的沙塵可多著呢！

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每日背誦第一期20

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每日背誦第一期22

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