运用评价化学品毒性藻类测试的标准实验方法 ，得到铜、锌和锰对月形藻生长的最小无显著差异浓度 （LNOEC）分别为31。

The lowest no observable effect concentrations (LNOEC) of Cu, Zn and Mn on the growth of Closterium lunula were found to be 31.

youdao

她自言自语地说：“啊，要是我能再得到一个柴架上的铜把手就好了！”

She soliloquized, "Oh, if I only had a brass andiron-knob again!"

youdao

文艺复兴以来这些符号就在炼金术中得到使用，表示某种元素，特别是金属铁和铜。

These symbols have been in use since the Renaissance [1] also denoting elements in alchemy, specifically the metals iron and copper.

youdao