Pure mathematics is, in its way, the poetry of logical ideas.

燃气发动机是所有热机中最完美的，因为它结合了蒸汽机和内燃机的优点。

You have to understand the local context to operate successfully in global markets.

行动对生命是很重要的，教育不能策划出让生命缓和下来或压抑它的方法。