complex

Modern aircraft engines are incredibly complex machines that require constant specialized maintenance.

(Chinese) 现代飞机发动机是极其复杂的机器，需要持续的专业维护。

Solving the global climate crisis is a complex challenge involving economics and politics.

(Chinese) 解决全球气候危机是一个涉及经济和政治的复杂挑战。

The company's new headquarters is a massive office complex located in the tech district.

(Chinese) 公司的新总部是位于科技区的一座巨大的办公综合楼。

The city built a state-of-the-art sports complex featuring three swimming pools.

(Chinese) 该市建造了一个拥有三个游泳池的先进体育中心。