crack length

例句：

1. 1. Thecrack in the wall was about 20 centimeters long.
   墙上的裂缝大约有20厘米长。
2. 2. Theengineer measured the crack lengthto ensure it wouldn'tcause further damage.
   工程师测量了裂缝的长度，以确保它不会进一步造成损害。
3. 3.The car's engine had a cracklength of about 5 millimeters.
   汽车引擎的裂纹长度大约为5毫米。