tervalent chromium

• 三价铬

tervalent chromium的用法和样例：

例句

1. The history of trivalent chromium electroplating was looked back.
   回顾了三价铬镀铬的历史。
2. Even miniscule amounts of chromium 6 can cause cancer.
   即使小剂量的六价铬也能引起肿瘤。