It's a common belief that fish can't remember anything for longer than seven seconds.

人们普遍认为鱼的记忆只有七秒。

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When I was about seven years old, my grandfather took me to a fish pond on a farm and told me to throw a stone into the water.

我七岁的时候，爷爷带我去农场的一个鱼塘，叫我往水里扔一块石头。

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Of the seven Americans in the draw, four are in Nadal's quarter, including both seeds, Mardy Fish and Sam Querrey.

本次参加法网的七个美国人中，有四位与纳达尔分在同一区，包括两位种子选手费什和奎雷。

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We've already landed seven fish this morning, under light breezes and a steely spring sky.

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He was joined in withdrawing from next week's event by former world number seven Mardy Fish, who is now ranked 41st in the world, and fellow American Brian Baker -- whose absences had been expected.

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Richard Pyle, a Hawaii-based researcher who helped design a breathing apparatus good for 500 feet, says he finds as many as seven new species of fish an hour at that depth.

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