carbon tetrafluoride

例句：

1. 1. The chemical was used to clean the engine.
   这种化学物质被用来清洁发动机。
2. 2. Carbon tetrafluoride is a toxic gas that can cause respiratory problems.
   碳四氟化物是一种有毒气体，可能导致呼吸问题。
3. 3. The researcher found that carbon tetrafluoride could be used as a solvent for organic compounds.
   研究者发现碳四氟化物可以作为有机化合物的溶剂。