When you have a good research design, the data can speak for itself.

Modern quarrying must marry the wisdom of geology with the innovation of engineering.

The best hedge against low oil prices is low breakeven costs.

我不是说唱歌手，我是一个让人心碎的人。

一个人若不能治理自己，便不能治理家庭；若不能治理家庭，便不能治理城市；若不能治理城市，便不能治理国家。

每种材料都有自己的语言。我们需要倾听它想成为什么。