1. 单调乏味的;毫无变化的
Something that is monotonous is very boring because it has a regular, repeated pattern which never changes.
monotonous
e.g. It's monotonous work, like most factory jobs...
与工厂大部分工作一样，这份工作也很单调乏味。
e.g. The food may get a bit monotonous, but there'll be enough of it.
饭菜可能会有些单一，但管够。