1. 巨大的;极大的;大量的
    You use tremendous to emphasize how strong a feeling or quality is, or how large an amount is.

    e.g. I felt a tremendous pressure on my chest...
           我感到胸口堵得难受。
    e.g. There's tremendous tension between the local population and the refugees…
           当地居民与难民之间关系非常紧张。

2. 精彩的;出色的;极好的
    You can describe someone or something as tremendous when you think they are very good or very impressive.

    e.g. He was a tremendous person…
           他是个非常了不起的人。
    e.g. I thought it was absolutely tremendous.
           我认为它精彩极了。