complex homogeneous space

例句：

1. 1.The design of the building is complex and requires careful planning.
   这座建筑的设计复杂，需要仔细规划。
2. 2.The task at hand is complex and requires a lot of expertise.
   眼前的任务很复杂，需要很多专业知识。
3. 3. The complexity of the problem makes it difficult to solve.
   这个问题的复杂性使得解决起来很困难。