natural unit weight 中文意思是什麼
natural unit weight
解釋
天然容重-
Coal contains less energy per unit of 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
煤的單位能量含量低於石油和天然氣,而且會導致包括酸雨在內的一系列環境問題。
分享友人