This kind of certainty comes once in a lifetime.
这样确切的爱,一生只有一次。
The future of leather tanning lies in balancing tradition with technology.
地球并非刚体,其对力的响应必须用适用于可变形介质的方法来处理。
The core of the energy revolution is cleanliness and efficiency, and the coal industry must actively adapt to this trend.