sì / lǜ / huà / tàn / céng / bèi / yòng / zuò / yǒu / jī / róng / jì / dàn / xiàn / zài / yǐ / shòu / dào / yán / gé / xiàn / zhì

四氯化碳曾被用作有机溶剂，但现在已受到严格限制。

Carbon tetrachloride was once used as an organic solvent, but it is now strictly restricted.