Something that is complex has many different parts, and is therefore often difficult to understand.
in-depth coverage of today's complex issues.
对当今复杂问题的深入报道。
a complex system of voting.
一套复杂的选举体制。
complex machines.
复杂的机器。
complexes
A complex is a group of buildings designed for a particular purpose, or one large building divided into several smaller areas.
a low-cost apartment complex.
一个低价公寓楼群。