Warning: file_put_contents(/www/wwwroot/ppbbu/n94.cn/cache/bc62c54963747a29022da6c21a3a6ca9.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/n94.cn/index.php on line 55
trace element英英字典_trace element剑桥英语解释_trace element柯林斯英文解释_94生活常识网有道词典
94生活常识网有道词典

trace element

T 开头单词

柯林斯词典

    trace element (trace elements)

  • 1. N-COUNT A trace element is a chemical element such as iron or zinc that occurs in very small amounts in living things and is necessary for normal growth and development. 痕量元素

  • 2. N-COUNT A trace element is a very small amount of a chemical element that is found in a metal or other substance. 微量元素

    • 返回 trace element

剑桥词典