pit,fissure和crack等有什么区别?
问题描述：
pit,fissure和crack等有什么区别?
这三个词都有缝隙的意思,但它们又有什么区别呢?
答
fissure n.long deep crack in rock or in the earth （岩石中或土地中的）深长裂缝.
pit （地面的）大坑,（通常指）深坑.
crack line along which sth has broken,but not into separate parts 裂缝; 裂纹