As many as four and a half million people watched today's parade.是什么意思？

As many as four and a half million people watched today's parade.

观看今天游行的人多达450万。

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

many

adj. 许多，多的；pron. （与复数动词连用）大多数人；

例句
There are many people who still find the act of abortion abhorrent.
仍有很多人对堕胎行为表示厌恶。

four

num. 四，四个，第四；n. 四个人（或事物）的一组，得四分的一击，四人赛艇；

例句
His car was held up and he was abducted by four gunmen...
他的车遭遇拦劫，随后他被4名持枪歹徒劫持。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

half

adj. 一半的，半个的；n. 半，一半，（啤酒等饮料的）半品脱，（比赛、音乐会等的）半场；adv. 一半，部份地；

例句
Too often he only absorbs half the information in the manual...
他对于说明书上所说的经常是一知半解。

million

n. 百万；adj. 百万的，无数的；

例句
In all some 15 million people live in the selected areas...
总共有大概1,500万人住在所选定的区域内。

people

n. 人，人类，居民，人民，种族；vt. 居住于，布满，使住满人，在…殖民，把动物放养在；

例句
Most people have very little difficulty in seeing why a Van Gogh is a work of genius.
多数人不难理解为什么凡·高的作品是天才之作。

watched

vt. 注视，注意（watch的过去式与过去分词形式）；

例句
He watched Karl run across the street to Tommy.
他看着卡尔向街对面的汤米跑去。

parade

v. 游行，展览，招摇过市，接受检阅；n. 检阅，游行，一系列，炫耀；

例句
...the parade grounds of Wellington Barracks.
威灵顿兵营的阅兵场