副詞 what is more:

1. in addition
   同義詞：furthermore, moreover

1. Comrades, read only choice books; and what is more, learn how to read before you set yourselves at the task of reading.
   同志們，讀最好的書; 更重要的是，在著手讀之前，先要知道如何去讀。
2. It is a useful book and, what is more, not an expensive one.
   這是有用的書，更難得的是不貴。
3. He is a good scholar, and what is more, a good teacher.
   他是一位淵博的學(xué)者，而且是一位優(yōu)秀的教師。