You have extensive knowledge of your class.

你必须要对于你的职业有大量、广泛的知识。

youdao

You must have extensive knowledge prior to engage in real trading.

你必须有渊博的现实交易知识。

youdao

You must have extensive knowledge prior to engage in real trading.

你必须有渊博的现实交易知识。

youdao