Exercising alone can be boring.

独自一个人锻炼可能会很无聊。

《柯林斯英汉双解大词典》

Without friends, life will be boring.

没有朋友，生活就会很枯燥。

youdao

Life would be boring without friends.

没有朋友，生活会很无聊。

youdao

Now these are going to be sort of dreary, boring, typical Martin lectures; dreary and boring historical surveys.

会比较沉闷，无聊，典型的Martin课程;,沉闷无聊的历史回顾。

耶鲁公开课 - 新约课程节选

If this were the end of the story though, it would be a kind of boring story and it's not the end of the story.

如果故事到这儿就戛然而止，未免过于乏味,故事还在继续。

耶鲁公开课 - 心理学导论课程节选

Now, I could go on right the way through here, but I'm going to stop because it gets to be a bit boring after a while.

我可以就这样一直算下去,但是还是到此为止吧,因为再这样下去会很无聊

耶鲁公开课 - 博弈论课程节选

Dividends can be boring things, but when it comes to your portfolio, they can be a saving grace.

FORBES: Look For Yield - In The Right Places!

Del Toro said that it would be boring to make a slavish adaptation.

NEWYORKER: Show The Monster

Where is it written that math, grammar and spelling have to be boring?

FORBES: It's Time For Technology To Disrupt Education