To keep your house mouseproof , check all small openings with a ballpoint pen. If it fits the hole, it will let mice in.
要使你的房子里没有小老鼠,用圆珠笔来检查下所有的小洞。如果圆珠笔能放进去的话,那小老鼠就可能钻进去。
A spider has hundreds of small openings in its body.
一只蜘蛛体内有数百个小开口。
Such cells take food in and let waste out through very small openings in their walls.
它们通过细胞壁上非常细小的孔吸进食物和排出废料。
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