as light as a butterfly

例句：

1. 1. She moved like a butterfly, so graceful and effortless.
   她移动得就像蝴蝶一样，那么优雅和毫不费力。
2. 2. The butterfly was so light that it could barely be seen against the dark sky.
   这只蝴蝶那么轻，几乎看不见它在阳光下的黑色背景。
3. 3. The butterfly's wings were so light that they seemed to float in mid-air.
   这只蝴蝶的翅膀那么轻，它们似乎在空中飘浮。