但随着铜价飙升和中国收紧信贷，许多企业一直在减少购买，降低库存水平。

But, as copper prices spiked and credit availability in China has tightened, many companies have been cutting back on purchases, trimming their inventory levels.

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但随着企业竞争的日益激烈，企业核心员工流失现象不断加剧，这些现象越来越多地受到了企业管理者和研究者们的关注。

However, with the increasing competition, the turnover of key employees is growing, these phenomena have attracted more and more attention from managers and researchers.

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