They found that in unventilated spaces levels can build up and, over time, cause health problems such as allergies and asthma.
研
表明,在不
风的空间里,时间长了,
影响健康,出现过敏、哮喘等症状。
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原版语文第五册 Fire! shouted the boys, for they were persuaded he could not do it without leave from a civil officer; and a young fellow spoke out, " We will knock him down for snapping, " while they whistled through their fingers and huzzaed.
“开枪!”那群少年连声高叫,事先有人向他们透风,假若市政官员在
的话,英
哨兵就不敢开枪。突然,一位年轻人叫道,“
他揍倒,折断他的枪,”四下响起一片呼哨和连声哄叫。
叫欧维的男人决定去死