英汉词典

1. 许多;大量
    If you say that you need or have a great deal of or a good deal of a particular thing, you are emphasizing that you need or have a lot of it.

    e.g. ...a great deal of money...
           大量的钱
    e.g. I am in a position to save you a good deal of time.
           我能够为你节省许多时间。

2. 许多;很多
    A deal of something is a lot of it.

deal

    e.g. He had a deal of work to do.
           他有许多工作要做。