1. He wore an overshirt over his t-shirt to stay warm in the cool breeze.
他穿了一件薄外套罩在他的T恤上，以抵御微风。

2. The overshirt is a versatile piece of clothing that can be worn for both casual and formal occasions.
这种轻薄外套是一种多功能的服装，可以在休闲和正式场合都可以穿。