to learn from an unpleasant experience so as not to repeat it
从不愉快的经历中吸取教训，以避免重复 (cóng bù yú kuài de jīng lì zhōng xī qǔ jiàoxùn, yǐ bìmiǎn chóng fù)
"After being late several times, he finally learned his lesson."
"在多次迟到后，他终于吸取了教训。" (zài duō cì chídào hòu, tā zhōngyú xī qǔle jiàoxùn)
to adopt an environmentally friendly lifestyle
to show others how to behave by doing it yourself
to achieve something one has long desired
to be better than others
In a position to be injured or in danger.
used to express a considered opinion
