imperfection of crystal lattice

例句：

1. 1. The car's engine is a source of imperfection for the driver.
   汽车的引擎对司机来说是一个缺陷。
2. 2. The painting has several imperfections that need to be fixed.
   这幅画有几个需要修复的瑕疵。
3. 3. The book has many imperfections in its translation.
   这本书在翻译中有很多不完美之处。