第三用英语说是third。
例句：
1、戴维斯第三次得分，观众欢声雷动。
When Davis scored for the third time the crowd erupted.
2、骑师在第三道栅栏处给重重摔下马来。
The jockey took a nasty tumble at the third fence.
3、上到第三层一共有多少磴楼梯？
How many stairs are there up to the second floor?
4、丛书的第三册现在正准备出版。
The third book in the series is currently in preparation.
5、当时我正怀着我们的第三个孩子。
I was pregnant with our third child at the time.
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