同样的原理可以用于使小刀更锋利或者清扫城市大街时。
The same principle can be used to sharpen knives or sweep city streets.
鲁尼从来就不是那种盘带类型的球员，不过他可以专注于自己那敏锐锋利的第一脚触球以及比对手更好的拿球虎护球能力，也使他变得很有杀伤力。
Rooney will never be this sort of player, but he could work on a sharper first touch and take on opponents more, which would make him more dangerous.
但是在反映之后被科尔决定的一个强硬的比赛使了很迟的注射偏斜在，之上他也是锋利的指出为他们的好财富认真工作的他运动员。
But reflecting after a tough match decided by Joe Cole's deflected shot late on, he was keen also to point out his players worked hard for their good fortune.
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