Innovation in coal mining isn't just about extraction—it's about doing it smarter, safer, and with less environmental impact.
身体单薄无力,就不要去背负重物,说话没有分量,就不要去规劝别人;没有钱就不要到人群中去,遭遇困难之际千万别去寻求亲戚的帮助。
The Government of the United States is a definite Government, confined to specified objects. It is not like the state governments, whose powers are more general.