1. He is a zealous supporter of our cause.
    他是我们事业的热心支持者。

2. The salesman seems very zealous to please.
    这位售货员看来非常热情，想取悦顾客。

3. She made zealous efforts to clean up the classroom.
    她非常热心地努力清扫教室。

1. 热心的：worthy#有价值的 | zealous#热心的 | feasible#可实行的

2. 积极的：Uncomplaining--耐心坚强的 | Zealous--积极的 | Airy--轻盈的

3. 热情的：beneficial 有益的 | zealous 热情的 | apt 聪明的,灵巧的

4. 热衷的：zealotry 热狂 | zealous 热衷的 | zealously 热心地

1. （尤指对政治或宗教理想）热情的，充满激情的，狂热的
    Someone who is zealous spends a lot of time or energy in supporting something that they believe in very strongly, especially a political or religious ideal.

    e.g. She was a zealous worker for charitable bodies...
           她对慈善事业充满热忱。
    e.g. He was a recent Catholic convert, and very zealous.
           他最近才皈依天主教，是一名狂热的信徒。

1. marked by active interest and enthusiasm

    e.g. an avid sports fan

    Synonym: avid