单词：lead-free
lead-free的用法和样例：
例句
- Copper has less resistance than lead.铜的电阻比铅的小。
- Zinc can also help the body fight lead absorbance.锌也可以帮助体内减少对铅的吸收。
词汇搭配
- lead-free zinc oxide无铅氧化锌
- lead-free gasoline无铅汽油
- bismuth free lead无铋铅
- nonleaded无铅的(如汽油等)的...
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