1. The situation in Lebanon is very complicated.

黎巴嫩的局势非常复杂。

2. His grasp of complicated concepts is impressive.

他对复杂概念的领悟力惊人。

3. Manners allow you to navigate life's complicated situations with grace.

礼貌可以让你得体地应对生活中的复杂情况。

4. His love life was complicated, and involved intense relationships.

他的爱情生活非常复杂，几段感情都是轰轰烈烈。

5. The biology of these diseases is terribly complicated.

这些疾病的病理极其复杂。