第四的英文：
fourth
number four

参考例句：

The Fourth Regiment deserted in a body.
第四团全体开小差了。

The fourth aircraft was forced to land alongside a Dutch trawler.
第四架飞机在一艘荷兰拖网渔船旁迫降。

A tarsal bone on the outer side of the foot in front of the calcaneus and behind the fourth and fifth metatarsal bones.
骰骨一块脚外侧的跗骨，位于跟骨之前、第四和第五跖骨之后

That vessel shall be confiscated pursuant to the first paragraph of Article 49 of the Regulation on Vessel Registration.
依照《船舶登记条例》第四十九条第一款的规定，依法没收船舶。

The fourth, a tall, thin, deeply tanned man with barn-door ears and a hooked nose, held an automatic pistol
第四个人是个晒得很黑、长着一对招风大耳和鹰勾鼻子的瘦高个，手里拿着一支自动手枪。

The quadruplicate copy
第四副本

The fourth group is allegro.
第四组是快板

I'll get off at the fourth station.
我在第四站下。

Time is sometimes called the fourth dimension.
时间有时候被称作第四维。

The champion is running in lane 4.
冠军跑在第四跑道上。

fourth是什么意思：
n. 第四，月的第四日；四分之一
adj. 第四的，第四个的；四分之一的
num. 第四

She was but just the fourth.
她只得了第四名。

Thailand is the fourth largest exporter of chicken.
泰国是世界第四大鸡类出口国。

Time is sometimes called the fourth dimension.
时间有时候被称作第四维。

number是什么意思：
n. 数；号码；算数
v. 给…编号；计算，数

The number was fifty.
该数字为五十。

There is safety in numbers
人多势众

It was an irrational number.
这是一个无理数。

four是什么意思：
n. 四；四个；第四

Four divides eight.
4能除尽8。

We have four terms a year.
我们每年有四个学期。

The hunters bagged four deer.
猎人们捕杀了4只鹿。