fly-blister

例句：

1. 1. The doctor advised himto stay home and rest for a fewdays.
   医生建议他在家休息几天。
2. 2. The fogrolled in, making it difficult to seebeyond the trees.
   雾气滚滚而来，使得树木之外难以看清。
3. 3. The scientistobserved the clouds and recordedtheir movement patterns.
   科学家观察了云层并记录了它们的移动模式。