Posttensioning
n. [建]后张,后加拉力
🗣️ 情景例句
They'll be here any minute.
他们马上就到了。
If the blind lead the blind, both shall fall into the ditch.
问道于盲，无益于事。
Why does aperson standing in a bus or train tend to fall when a sudden start is made?
一个人站在公共汽车或火车上，当车突然开动时，他为什么会倾倒呢？