chǎo / cài / shí / bù / yào / yòng / shēng / yóu / yào / děng / yóu / rè / le / zài / xià / guō

炒菜时不要用生油，要等油热了再下锅。

Don't use unboiled oil when stir-frying; wait until the oil is hot before adding ingredients.