在不同时段，科学家们把麦克风放在食水鱼水箱中，这个水箱中有10条食人鱼，它们为分3组。
They dropped a microphone into a piranha tank that , at different times , held three groups of10 fish .
她想留下一些明天做三明治吃，就请服务员把它放在狗食袋里。
Intending to save some for a sandwich the next day , she asked the waiter to put it into a doggie bag .
放食