文火

wén huǒ mèn wǔ shí fēn zhōng

文火焖五十分钟

simmer gently for fifty minutes

yòng wén huǒ jiā rè

用文火加热

heat gently

cǎo yào yīng yòng wén huǒ lái jiān

草药应用文火来煎。

Medicinal herbs should be decocted on a slow fire.

yòng wén huǒ jiān yào

用文火煎药

decoct medicinal herbs on slow fire