Examples
xiǎng想yào要jiǎn féi减肥jiù就bì xū必须kòng zhì控制shí yù食欲。
想要减肥就必须控制食欲。
If you want to lose weight, then you need to control your appetite.
我今天的食欲很好。
I have a good appetite today.
滑完雪后，我发现我食欲大增。
After skiing, I find that I have a voracious appetite.