quiet aircraft

例句：

1. 1. The room is quiet because the baby has fallen asleep.
   房间很安静，因为宝宝已经睡着了。
2. 2. The lake is so quiet that you can hear a pin drop.
   湖面如此安静，以至于你能听到一根针落地的声音。
3. 3. The quiet of the forest was almost deafening.
   森林的宁静几乎让人无法听见。