The midfielder has struggled to recover his dynamism and the usual knocks seemed to take longer to ease off, but his condition will be critical to Liverpool.
这位中场仍在努力恢复活力，而摆脱往常的伤病似乎也要耗上更多的时间，但他的状态对利物浦可谓生死攸关。
Development of transport prior to the economic development is a pre - condition and guarantee for economic take-off.
超前发展的交通运输，是经济起飞的前提条件与保障。
The warship air-wake is a major environmental condition for the helicopter during take-off and landing from warship, which affects the helicopters control and stability and flight safety.
舰船空气尾流场是直升机舰上起降时的主要环境条件，对直升机的操稳性能及飞行安全有很大的影响。
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