An added complication is the growing concern for the environment.还有个问题是人们越来越关注环境。

There's one further complication.还有一个麻烦事。

Proust's complication of the relation between author and work普鲁斯特把作品与作者关系的复杂化

Blindness is a common complication of diabetes.失明是糖尿病常见的并发症。