我的许多客户在项目末期分配两到三周的时间来进行压力测试。
I have had many customers allocate two or three weeks to stress testing at the end of a project.
据研究，事实上，一个小痘痘要花两到三周时间才会凸显在你的皮肤上。
According to studies, it actually takes two to three weeks for a pimple to emerge on the surface of your skin.
激光能去除眼球虹膜最外层的棕色素或黑色素，而蓝眼珠会在两到三周之后显现。
The laser energy removes the brown pigment, or melanin, from the top layer of the iris, and the blue eye colour emerges over the following two to three weeks.
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