A gun went off and people cowered behind walls and under tables.
一声枪响，人们缩到墙后或桌子底下躲起来。
《牛津词典》
2
She was carefully dressed when she went to clothing stores, and wore white pads called shields under her arms so her dress or blouse would show no sweat.
她去服装店时穿着很讲究，腋下夹着一种叫做盾牌的白色垫子，这样她的衣服或衬衫就不会露出汗迹了。
3
When the company wentunder, tales of his extravagance surged through the industry.