Are the trees and water useful?

树木和水有用吗？

youdao

Such an argument is plausible, however, it is less useful for understanding the sociopolitical implications of water use and control in other, water-rich parts of the Maya region.

这样的论据是有道理的，然而，对于理解玛雅地区其他富水地区的用水和控制的社会政治影响来说，就没那么有用了。

youdao

They can walk on water, a useful trick should they wish to visit the mainland.

他们能行于水上，如果他们在大陆游历，这将是很有用的一项技能。

youdao

They hope that future synthetic cells can make useful bacteria for products like bio-fuels or vaccines, and to clean up polluted water.

VOA: special.2010.07.20

The systems are especially useful for those who are too sick to go a long way for water.

VOA: special.2009.07.27

Research suggests that up between 20 and 30 gigawatt-hours (GWh) of electric energy could be stored as useful heat in hot water.

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Nepal says that the rebels are destroying water systems, telecoms equipment and other useful materials.

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Water or sports drinks, however, are also useful as well for recreational exercise.

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