ambitious

The young CEO has an ambitious plan to expand the tech startup into five European countries by next year.

(Chinese) 这位年轻的首席执行官有一个雄心勃勃的计划，要在明年之前将这家初创科技公司扩张到五个欧洲国家。

Constructing a base on Mars is the most ambitious engineering project humanity has ever attempted.

(Chinese) 在火星上建造基地是人类尝试过的最宏大的工程项目。