这种清洁剂含有EDTA，可以软化硬水中的矿物质。

This cleaner contains ___EDTA to soften minerals in hard water.

医生建议使用EDTA来清除他体内的汞。

The doctor recommended ___EDTA to remove mercury from his body.

这种罐头食品添加了EDTA来延长保质期。

This canned food contains ___EDTA to extend its shelf life.