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So why did the economies overall perform so poorly ?

为什么经济整体表现如此之差？

These movements can also be used to perform other tasks , like adjust volume or open the notifications center .

这些动作也可以用来进行其它操作，比如调节音量，开启通知中心等。

Pharmaceutical companies ( and the outside firms they hire ) perform competitive intelligence in a variety of ways .

制药企业（以及他们聘请的外部机构）通过多种方式进行竞争情报收集。

Why did united russia perform so dismally ?

为何统一俄罗斯党表现如此暗淡呢？

The researchers perform a physical examination on a panda cub .

研究人员在对一只熊猫幼崽进行全身检查。