One of the prevalent methods in air traffic flow management is ground holding.
地面等待是空中交通管理中普遍应用的一种方法。
The ground-holding is one of the main methods in ATFM (Air Traffic Flow Management).
实施地面等待是ATFM（空中交通流量管理）中主要采用的一种方法。
Holding on the ground is a kind of widespread method based on traffic flux management.
基于交通流量管理的地面等待是空中交通管制中普遍应用的一种方法。
The surface dust, low humidity of the air, ground and traffic dust stirred up.
地面灰尘大，空气湿度低，地面的人和车流使灰尘搅动起来。
The construction of underground railways has eased traffic pressure on the ground.
地下铁道的修建减轻了地面交通的压力。
After an hour's drive, traffic ground to a halt again - road construction this time.
开了一个小时，车流又停住不动了，这次是因为前方在修路。
After an hour's drive, traffic ground to a halt again - road construction this time.
开了一个小时，车流又停住不动了，这次是因为前方在修路。
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