煤炭的未来在于可持续和负责任的采矿实践。

量子计算的挑战不仅是技术上的，也是概念上的。

While statistics say that 95 percent of all young men who enter business fail, this should not discourage any one. Go out with the spirit “sink or swim,”and a person will not sink.

测量地球是地理学的基础。