例句與造句

1. The failure of concrete is caused by the formation , growth and confluence of crack , then creating the macro cracks in concrete
   研究表明混凝土的開(kāi)裂，首先起源于骨料和砂漿的粘結(jié)界面，進(jìn)而發(fā)展至砂漿中。
2. It's difficult to find macro crack in a sentence. 用macro crack造句挺難的