他担任过改装赛车大赛的主持人。用英语怎么说？

他担任过改装赛车大赛的主持人。

He acted as grand marshal of a stock car race.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

acted

link-v. 表演；v. 行动( act的过去式和过去分词 )，做，表演，起作用；

例句
Freed acted with his accustomed shrewdness.
弗里德以他一贯的精明风范行动起来。

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。

grand

adj. 宏大的，宏伟的，（最）重要的，豪华的；n. 一千美元，大钢琴；

例句
The Oriental in Bangkok is the apotheosis of the grand hotel.
曼谷的东方饭店是豪华饭店的典范。

marshal

n. 元帅，典礼官，执法官，消防局长；vt. 整理，排列，集结；vi. 排列，编队；

例句
He will have been pleased by Marshal Yazov's assurance of the armed forces' loyalty.
当亚佐夫元帅向他保证武装部队的忠诚时，他会感到心满意足的。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

stock

n. 股份，股票，库存，树干，家畜；adj. 常备的，存货的，陈旧的；vt. 提供货物，备有；vi. 出新芽，囤积；

例句
...a disastrous rise in interest rates allied with a stock market slump.
股市下跌的同时，利率却在灾难性地上涨

car

n. 汽车，车厢，轿车；

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。

race

n. 赛跑，竞争，人种，民族；v. 参加比赛，使比赛，快速移动，剧烈跳动；

例句
I am very critical of the adequacy of Britain's race laws...
我对英国种族法律的适当性颇有微词。