英汉词典

1. 第十
    The tenth item in a series is the one that you count as number ten.

2. 十分之一
    A tenth is one of ten equal parts of something.

    e.g. We received only two tenths of an inch of rain during the entire month of June.
           整个 6 月，我们这里的降水量只有0.2英寸。