Definition (空氣)
To let down something inflated, you release the air contained within.
對…放氣,排出…的空氣
After the game, they decided to let down the balloon.
比賽結束後,他們決定把氣球放氣。
For safety, please let down the air in the life raft before the flight.
為了安全,請在飛行前將救生筏的空氣排出。
The children watched happily as their parents let down the football.
孩子們開心地看著父母把足球放氣。