end surface

例句：

1. 1. The car has a smooth end surface that makes it easy to drive.
   这辆车有一个光滑的端面，使得驾驶变得容易。
2. 2. The engineer carefully polished the end surface of the machine to make it look new.
   工程师仔细地抛光了机器的端面，使其看起来焕然一新。
3. 3. The scientist studied the end surface of the crystal to understand its structure.
   科学家研究晶体的端面，以了解其结构。