time flutter

例句：

1. 1.
   使
2. 2.轻率地行动；3. 使不安；4.
   使
3. 5.
   使
4. 1. The butterfly's wings fluttered in the breeze.
   蝴蝶的翅膀在风中轻轻扇动。
5. 2. The leaves fluttered in the autumn wind.
   秋天的风让树叶轻轻飘动。
6. 3. The bird fluttered its wings nervously.
   那只鸟紧张地扑动着翅膀。