周时大夫。
一只好猎犬对四周任何响动均甚警觉。
A good hunting dog is alert to every sound and movement around.
对于任一任务的最大持续时间，许多项目经理都有不同的经验，但一般而言，大多数任务都不应超过两周。
Many project managers have different "rules of thumb" for the maximum duration of any one task, but a common one is that most tasks should not exceed two weeks.
我为在两国建交50周年的喜庆时期任驻华大使感到骄傲。
I am proud to be appointed as the Afghan ambassador to China on this happy occasion of the 50th anniversary of the establishment of diplomatic ties between the two countries.
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