在过去一周里对首都的袭击次数下降了。

The number of attacks on the capital had gone down over the past week.

《柯林斯英汉双解大词典》

截至目前，袭击次数之多几乎使警方无力招架。

By now the number of the attacks in the city was making it almost impossible for the police to keep up.

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由于海军护航和2009年建立的运输走廊，在战略重要位置亚丁湾，海盗袭击次数相对较少。

There are now proportionately fewer attacks in the strategically important Gulf of Aden, thanks in part to escorted convoys and to a transit corridor set up in 2009.

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