如不控制这种植物的生长，池塘和水道很快就要被阻塞。
The plant will soon choke ponds and waterways if left unchecked.
用增加和减少每天黑暗小时数的方法，科学家已经能够控制植物生长，如同控制一个电器开关。
By increasing or lessening the hours of darkness in each day, the scientists have been able to turn plant growth off and on like an electric switch.
据说这种植物会把土壤中的水分吸光，让附近的植物无法生长，如果不采取措施加以控制，它将毁灭草原。
The plant are said to deprive nearby plants of water and grow rampantly, destroying the grassland unless measures are taken against it.
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