macro crack造句

例句与造句

1. The failure of concrete is caused by the formation , growth and confluence of crack , then creating the macro cracks in concrete
   研究表明混凝土的开裂，首先起源于骨料和砂浆的粘结界面，进而发展至砂浆中。
2. It's difficult to find macro crack in a sentence. 用macro crack造句挺难的