Mobile phones stop teenagers from spending money on clothes or cigarettes. 有了移动电话使少年把更少的钱花在服装和抽烟方 面. “stop... doing... 意为“阻止--做.防止 --发生 .from可省略. The accident stopped me arriving on time. 这场事故使我没能及时到. The waste water is stopped from being poured into the river. 废水禁止倒入这条河里. 注:stop用作被动语态时from不能省略. 【
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