风向袋

例句：

1. 1. The windsock is a simple device to measure the wind direction.
   风向袋是一种简单的装置，用于测量风向。
2. 2. The wind vane on the flagpole indicates the prevailing wind direction.
   旗杆上的风向标指示着主导风向。
3. 3. The farmer used a windsock to check the weather forecast before planting his crops.
   农民使用风向袋来检查天气预报，以便种植他的庄稼。