external angle head

例句：

1. 1. The engineer used an external angle to adjust the position of the machine.
   工程师使用外部角度调整机器的位置。
2. 2.The team leader decided to use an external angle to improve the efficiency of their operations.
   团队领导决定使用外部角度来提高他们的操作效率。
3. 3. The scientist conducted an external angle study to investigate the effects of pollution on wildlife.
   科学家进行了一项外部角度研究，以调查污染对野生动物的影响。