contact metasomatism

例句：

1. 1. The patient developed contact dermatitis after prolonged exposure to the chemical.
   患者长时间接触该化学物质后发展了接触性皮炎。
2. 2. The researcher discovered that certain bacteria could cause contact dermatitis in humans.
   研究者发现某些细菌能引起人类的接触性皮炎。
3. 3. Doctors recommend washing hands thoroughly before and after contacting skin with any kind of chemicals.
   医生建议在与任何种类的化学物质接触皮肤之前和之后彻底洗手。