unit rain的意思|示意

Coal contains less energy per unit of weight than weight than natural gas or oil; it is difficult to transport, and it is associated with a host of environmental issues, among them acid rain.

煤的单位能量含量低于石油和天然气，而且会导致包括酸雨在内的一系列环境问题。

Coalcontains less energy per unit of weight than natural gas or oil; it isdifficult to transport, and it is associated with a host of environmentalissues, among them acid rain.

煤的单位能量含量低于石油和天然气，而且会导致包括酸雨在内的一系列环境问题。

To prevent fire or shock hazard, do not expose the unit to rain or moisture.

为避免引发意外的火灾或遭受雷击的危险，请勿将本机置于雨点所及或者潮湿的地方。