预测性的元素位于信封框架的第二层和第三层。
Predictive elements lie at the second and third layers of the envelope framework.
区别性是非常重要的,它要求所有元素都应当是独一无二的。
Distinctiveness: the important properties of the necessary elements should be distinguishable.
在沥青沥青铀矿矿中提炼和测量出各种各样的物质的工作是非常繁重、肮脏和单调乏味的,但是玛丽于1898年发现了两个新的放射性元素:其中的一个,她根据祖国波兰的名称,称此元素为钋,她命名第二个所发现的元素为镭。
It was heavy, dirty, and tedious work to separate and measure the various substances, but Marie was able to discover two in 1898. She named one substance polonium, after her motherland of Poland.
应用推荐