这三排是前锋, 每排70名士兵.用英语怎么说？

这三排是前锋, 每排70名士兵.

These three ranks are vanguards, each with 70 warriors.

these

adj. 这些的；pron. 这些；

例句
There's lots of money about these days for schemes like this.
近来这类计划资金充足。

three

num. 三，三个，第三（章，页等）；n. 三岁，三个人[东西]，三，三个；adj. 三的，三个的；

例句
Outsiders who wed islanders are given only three years' right of abode at first.
岛外的人和岛民结婚之初只能获得三年的居住权。

ranks

n. 排( rank的名词复数 )，等级，地位，军衔；

例句
Such people often experience less stress than those in the ranks immediately below them.
这些人承受的压力往往小于那些职位仅次于他们的人。

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

vanguards

n. 先锋，前锋（vanguard的复数形式）；

例句
They are the vanguards of the working class.
他们是工人阶级的先锋队.

each

adj. 每，各自的；pron. 每个，各自；

例句
They were completely absorbed in each other...
两人彼此倾心。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

Warriors

n. 武士，勇士，战士( warrior的名词复数 )；

例句
The aims of the negotiators in New York again seem likely to collide with the aims of the warriors in the field...
看来，纽约谈判人员的目标可能会再次与战场上勇士们的目标发生冲突。