必要 bì yào necessaryessentialindispensablerequired Example sentences 你没有必要为这件事生气。 nǐ méiyǒu bìyào wéi zhè jiàn shì shēngqì. You don't have to be angry about this 他很忙,如果没有必要的事就不要去吵他。 ta hěn máng, rúguǒ méiyǒu bìyào de shì jiù bùyào qù chǎo tā. He's really busy, so don't bother him if not necessary