一旦这些植物耗尽它们储存的水或者用完地下水源，它们就会停止生长并开始死亡。
Once these plants use up their stored reserve or tap out the underground supply, they cease growing and start to die.
以前广泛使用的增氧剂是甲基叔丁基醚，后来有研究发现甲基叔丁基醚会污染地下水，因此在2004年久停止使用了。
Previously, MTBE (methyl tertiary - butyl ether) was the oxygenate of choice, but fell out of favour in 2004 when it was found to contaminate ground water.
说明即使不停止开采地下水，只要将地下水的采取量控制在一定的范围，也可以大大减轻地面沉降。
Therefore, the land subsidence can be alleviated by limiting the withdrawal volume even if groundwater withdrawal is not stopped.
水流到达地下水位后便停止下流。这里缓缓流动的河流切割出一条圆形隧道。
The downward rush is halted when the water table is reached. Here the slow-flowing river carves tunnels with a more rounded profile.
水流到达地下水位后便停止下流。这里缓缓流动的河流切割出一条圆形隧道。
The downward rush is halted when the water table is reached. Here the slow-flowing river carves tunnels with a more rounded profile.
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