1 sentence for 约束 (yuē​shù — to restrain)

1. 如果你不关心你在做什么，你就很难约束自己。

   rú​guǒ nǐ bù guān​xīn nǐ zài zuò​shén​me, nǐ jiù hěn nán yuē​shù zì​jǐ.

   If you don’t care about what you’re doing, it’s very hard to discipline yourself.

   Source: CCMatrix