He found plenty of references to this supposed family duty in documents from the period, but never any details.

他找到了很多来自那个时期的所谓家庭任务的参考资料，但从没有任何细节。

youdao

Duty crime is a multiple crime in current transition period of China.

职务犯罪是我国当前社会转型时期的一类多发性犯罪。

youdao

With the same magnitude, random period error casts much larger effect on the conversion efficiency than random duty cycle error, which is similar with the case in bulk crystals.

随机周期长度偏差对准相位匹配波导中差频效率的影响要比随机占空比偏差的影响来得大，这与单块周期极化晶体中的情况类似。

youdao

Located in a period building that once did duty as an engineering school, the Inn at the Market in Pike Place Market is a red-brick, boutique hotel.

BBC: Mini guide to Seattle, Washington

This can be tough for military personnel who may move frequently so an exception applies: you can choose to have the five year period suspended during any period you or your spouse serve on qualified official extended duty while serving in the armed forces (some limits and exceptions apply).

FORBES: Tax Tips for the Military on Memorial Day