But right now I am going to give it to you as Mendeleev enunciated it. Atomic number, we will learn later, is the improvement.
但是现在我就要告诉你们,门捷列夫发表了它,原子序数,我们之后会学到,那是很大的进步。
and she has really made a lot of progress. I've been teaching her for almost 2 years,
她真的进步很大。我教她将近两年了,
Let's move onto something that really took the giant step ahead, and that was Mendeleev.
我们换个话题,谈论一个很大的进步,那便是门捷列夫。
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