例句與造句

1. An offering vessel near the tomb contained bits of jade, animal bone and bits of shell burned together with cinnabar, leaving a metallic mercury residue.
2. The miners, who pan for gold throughout Suriname's jungle interior, are seen as a serious threat to the environment, since they leave behind mercury residue in the panning process.
3. It's difficult to find mercury residue in a sentence. 用mercury residue造句挺難的