a bit

基本解释

That's going a bit too far.
你这话有点出格了。
《新英汉大辞典》
Let me premise my argument with a bit of history.
让我引述一些史实然后摆出我的观点。
Do you mind backing off a bit, Sir, while we clear this wreck out of the way?
先生，您能把车子往后移动一点吗?我们要将这辆坏车从路上清除。

The outside layers are a bit crunchy, then the soft part takes over and the whole thing seems to just melt in your mouth.
OK, so now, Romeo: "shall I hear more, or shall I speak at this?" Fellows, a bit of advice, don't interrupt.
现在，罗密欧，我是继续听下去呢,还是现在就对她说话，同学们，有点建议，别打断。
麻省理工公开课 - 固态化学导论课程节选
I'll go into the library after we're finished this, but it's just... to give my life a bit of diversities,
我们谈话结束后我还是会回到图书馆去，但是现在……让我的生活更加多样化一点吧，
正在写论文 - SpeakingMax英语口语达人

The state most afflicted by bed bugs is a bit of a surprise: Ohio.
FORBES: America's Most Bed Bug-Infested Cities