'family jet lag' is the condition people suffer when they are physically and emotionally drained by festive family trips.
“家庭时差”指的是在假日的家庭旅行之后，人们感到身体和精神上都很疲惫的情况。
Generally, tunnels are thus designed to operate under a drained condition. A great deal of uncertainties, however, remain concerning leakage controls in subsea tunnels.
一般来说，隧道的设计方案均允许适当排水，但是海底隧道设计为排水隧道时，存在流量控制等相关不确定性的因素。
The sand column, saturated at its lower portion and initially in the condition of hydrostatic equilibrium, is drained at its bottom at constant head.
砂柱下部饱和并处于静水平衡状态，在底部为定水头的条件下进行排水。
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