例句與造句

1. The residual radioactive contamination on the surface is significantly reduced once the strippable coating is removed.
2. The site was certified to Department of Energy standards and guidelines for cleanup of residual radioactive contamination in 1993.
3. The betatrons were still at the plant in late 1992 " in a building on the southern section of the plant property " The building " had residual radioactive contamination until remediation in 1993 ."
4. It's difficult to find residual radioactive contamination in a sentence. 用residual radioactive contamination造句挺難的