When you don 't get enough sleep, you become tired and cross. Disease germs attack a tired person more easily than a rested one.

睡眠不足时，你疲倦而且脾气暴燥。与休息好的人相比，疲倦的人更易受到病菌的侵袭。

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"When the forces of the TFG attack al-Shabab and score victories, we don't care from which geographical positions they start the attack,".

VOA: standard.2009.08.20

"Don't attack their weakness because their strength is still there, " he said.

BBC: David Campese urges end to England's scrum focus

We don't attack for the sake of it.

BBC: News | UK Politics | Charles Kennedy's speech in full

Lions don't normally attack full-grown elephants, but they sometimes prey on elephant calves.

WSJ: Walk With the Animals