fourth; fourthly

1. 第四題和第五題我不會，但是剩下的我都答了。
   I can't do the fourth and fifth questions but I've done all the others.
2. 800米賽是下午的第四項比賽。
   The 800m is the fourth event of the afternoon.
3. 她在比賽中一度領(lǐng)先，但最後得第四名。
   She was leading for part of the race but finally finished fourth.
4. 她生了第四個孩子後決定做絕育手術(shù)。
   After her fourth child she decided to be/have herself sterilized.
5. 火星是太陽系的第四顆行星。
   Mars is the fourth planet in order from the sun.
6. 她生了第四個孩子后決定做絕育手術(shù)。
   After her fourth child she decided to have herself sterilized.
7. 我是第四騎兵部隊的一員。
   I am a soldier of the fourth cavalry.
8. 時間有時被稱為第四度空間。
   Time is sometimes called the fourth dimension.

第的英語翻譯：

四的英語翻譯：