Opencast
a. 露天开采的
📖 牛津释义
opencast
adj [usu attrib 通常作定语]
(of mines or mining) at or from a level near the earth's surface （指矿或采矿）露天开采的
opencast coal-mining 露天采煤. Cf 参看 deep-mined (deep2).
🗣️ 情景例句
That's a great idea.
好主意。
This telephone line is interrupted.
这个电话不通。
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，