at one swallow

例句：

1. 1. At one swallow of rain, the flowers bloomed brightly.
   一场雨后，花儿盛开得格外鲜艳。
2. 2.The old man had lived alone for many years, but at one swallow of love, he found a new family.
   这位老人独自生活了许多年，但在一次爱的呼唤中，他找到了新家庭。
3. 3. The story is about a young boy who was at one swallow of courage and decided to save his little sister from drowning.
   这个故事讲述了一个勇敢的小男孩，在一次小小的勇气下决定救出他的妹妹免于溺水。