What's worse, the variety of tools out there don't even share a common vocabulary.

更糟的是，这些形形色色的工具甚至没有一个公共的词汇表。

youdao

So far the focus has been on vocabulary and using that vocabulary in a variety of sentences.

目前我们学习的重点是词汇和词汇在不同句式中的运用。

youdao

One way words cross from our receptive vocabulary to our productive use is through sufficient exposure to the word in a wide variety of contexts.

从接受型词汇向表达型词汇转化的一个途径是通过在不同的语境下的多次接触来实现的。

youdao

Students are also paired with on-line "pen-pals" in the U.S. who help extend their vocabulary, though perhaps not always of the textbook variety.

CNN: On-line in Yunnan