Business changes happen frequently in the competitive business environment.

业务更改在竞争激烈的业务环境中会频繁发生。

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The sea ice disasters influenced by the cold waves happen frequently in the Laizhou Bay.

受寒潮影响莱州湾内海冰灾害发生频繁。

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However, the circumstances that the packing bug appear on cellophane packer happen frequently.

然而，小盒透明纸包装缺陷现象却是经常出现的。

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The spokesman indicated that cases of people displaying unusual behavior near the White House grounds happen frequently.

CNN: Secret Service detains man after 'unusual' behavior near White House

Violence in Iraq has fallen since the height of sectarian fighting in 2006 and 2007, but deadly attacks still happen frequently.

NPR: Series Of Explosions In Iraq Kill 22

On a practical level in large organizations, leads going awry or out of channel communications happen frequently, but lets focus on how it could be fixed, especially when you consider that some of this system is already automated.

FORBES: What Do I Do With this Customer Lead From My Social Network?