为测验这些“祖母军”的重要性，井吴博士和其同事引入了一种以蚜虫为食的瓢虫幼虫。
To test the importance of these militant matrons, Dr Keigo and his colleagues introduced predatory ladybug larvae to the plants.
但格罗夫博士说因为人类体重增加的一个重要原因就是零食，因此他需要猴子们任何时候都能独自呆着，这样它们才会在两餐之间吃些零食。
But Dr.Grove said he needed the animals separated at all times so they could snack between meals, since that is an important reason people gain weight.
斯坦福大学霍普金斯海洋站的萨尔瓦多·乔根森博士发现，冬天，食人鲨会离开海豹聚居地(整个夏天它们都在那里以海豹为食)，动身前往温暖的水域。
Dr Salvador Jorgensen, of Stanford University's Hopkins Marine station, found that in winter, sharks leave seal colonies, where they feed all summer, and set off for warmer waters.
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