例句與造句

1. 41 mg / l and 2 . 23 mg / l respectively . the safe concentration of cu to crucian was slightly lower than standard of fishery water quality
   Cu對鯽魚的安全濃度略低于漁業(yè)水域水質(zhì)標準， zn 、 cd和cr的安全濃度遠遠高于標準。
2. The safe concentrations of zn , cd and cr to crucian were far exceeded the standard . the short - term accumulation and distribution in young crucian tissue of mixed secure concentrations of heavy metals cu , zn , cr and cd pollution was studied . the results showed that associated interaction of the four heavy metals was synergistic effect of accumulated toxic
   研究了安全濃度的混合重金屬cu 、 zn 、 cr 、 cd污染在鯽魚幼體組織中短期的積累和分布，實驗結果表明： cu 、 zn 、 cd和cr四種重金屬之間的聯(lián)合作用為毒性劇增的快同作用。
3. It's difficult to find safe concentration in a sentence. 用safe concentration造句挺難的