qǐ / fēi / qián / gōng / chéng / shī / jiǎn / chá / le / shēng / jiàng / duò / shì / fǒu / yùn / zhuǎn / zhèng / cháng

起飞前，工程师检查了升降舵是否运转正常。

Before takeoff, the engineer checked whether the elevator was working properly.