雨水太多，阳台上的铁栏杆已经开始生锈了。

Yǔshuǐ tài duō, yángtái shàng de tiě lángān yǐjīng kāishǐ shēngxiù le.

Because of too much rain, the iron railings on the balcony have already started to rust.

这把刀放在厨房里很久没用，都生锈了，还能用吗？

Zhè bǎ dāo fàng zài chúfáng lǐ hěn jiǔ méi yòng, dōu shēngxiù le, hái néng yòng ma?

This knife has been left in the kitchen unused for a long time and is all rusty; can it still be used?

如果不定期保养，自行车的链条很容易生锈断裂。

Rúguǒ bù dìngqī bǎoyǎng, zìxíngchē de liàntiáo hěn róngyì shēngxiù duànliè.

If you don’t maintain it regularly, the bicycle chain can easily rust and break.