弱冲击故障检测是故障诊断中既困难又十分重要的研究课题，是实现故障早期诊断的基本手段。

Detection of weak impact fault is difficult but very important in mechanical fault diagnosis, and it is the major tool for early diagnosis.

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但与英镑相比欧元遭受的打击稍弱，这表明，随着几乎所有经济体都受到冲击，投资者或许正在转向最大、交易最活跃的货币。

But it has suffered less than the pound, a sign that investors may be gravitating toward the largest, most highly traded currencies as nearly all economies stumble.

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但出口的走弱，可能会对该国低利润的生产商造成冲击。

Weaker exports would hit many of its low-margin producers.

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