environment contamination

• 环境沾污

environment contamination的用法和样例：

例句

1. The brass surface must be free of contamination.
   黄铜表面必须未经沾污。
2. In conventional IG processes, the DZ can form regardless of the nickel contamination sequence.
   采用传统的内吸杂工艺，镍沾污的次序对洁净区的形成没有影响。