fēi / jī / jiàng / luò / shí / fēi / xíng / yuán / huì / tiáo / jié / jīn / yì / lái / jiàng / dī / sù / dù飞机降落时,飞行员会调节襟翼来降低速度。When the plane lands, the pilot adjusts the wing flaps to reduce its speed.