频仍

nèi yōu wài huàn pín réng

内忧外患频仍

be subject to repeated domestic strife and foreign aggression

wèi jìn shí qī shì wǒ guó lì shǐ shang zhàn luàn pín réng de dòng dàng shí qī

魏晋时期是我国历史上战乱频仍的动荡时期。

Wei-Jin period are history of frequent war in our country.

jī qì cháng luǒ lù zhe yīn cǐ shì gù pín réng

机器常裸露着，因此事故频仍。

Machinery was often unprotected and accidents were frequent.