The bathroom is ventilated by means of an extractor fan.这个浴室使用抽风扇通风。He makes fresh orange juice with an electric extractor.他用电动榨汁机榨取新鲜的橙汁.The inspector asked the restaurant to replace the filter on the air extractor.监察员要...
硅酮隆胸植入物a silicone breast implant一种叫作吡啶酮的新型抗艾滋病药物能促使艾滋病毒变异，使其不能繁殖，也不会再感染新的细胞。A newer anti-HIV drug called pyridinone caused HIV to mutate into a form which could not reproduce or infect new cells.所有的主要难点都涌现在烯酮 ( 1 ) 的合成中....
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