如果没有法律的约束，社会就会变得很混乱。

Rúguǒ méiyǒu fǎlǜ de yuēshù, shèhuì jiù huì biàn de hěn hùnluàn.

If there were no constraints from the law, society would become very chaotic.

他很自律，不需要别人来约束他。

Tā hěn zìlǜ, bù xūyào biérén lái yuēshù tā.

He is very self-disciplined and doesn’t need others to restrain him.

父母要适当地约束孩子的行为。

Fùmǔ yào shìdàng de yuēshù háizi de xíngwéi.

Parents should appropriately restrain their children’s behavior.