Prestressing
预加应力; 预拉伸
🗣️ 情景例句
Please keep off the grass.
请勿践踏草地。
Trust thyself only, and another shall not betray thee.
只要信任你自己，别人不会辜负你。
Shortly afterwards, four more policemen arrived and remonstrated with the workmen.
一会儿工夫，又来了4个警察，规劝工人离开。