flatten out

(of an increasing quantity or rate) show a less marked rise; slow down

（上漲數(shù)量或速度）減緩

make an aircraft fly horizontally after a dive or climb

（讓飛機(jī)）改平

he flattened out and made a fine three-point landing.

他把飛機(jī)改平后，來了一個(gè)精確的三點(diǎn)著陸。