释义：君子在面对挫折、困难的时候，应该反躬自问，修养品德。蹇（jiǎn），多指行动迟缓、困苦、不顺利的意思。

The future of chemistry lies in developing sustainable methods that work with nature, not against it.

取得成功的秘诀是开始。

I am interested in the human condition, in what it means to be alive, in the nature of existence.

投资于农民教育就是投资于乳制品的未来。