to behave in a way that makes people believe that you have a particular characteristic

She comes across really well (= creates a positive image) on television. 她在电视上给人的印象真的很不错。

He comes across as a bit of a bore in interview. 采访中他表现得有点儿令人厌烦。

If an idea or emotion comes across in writing, film, music, or when someone is speaking, it is expressed clearly and people notice it.

What comes across in his later poetry is a great sense of sadness. 他后期的诗歌表露的是强烈的悲伤情绪。

to find something by chance

He came across some of his old love letters in his wife's desk. 他在妻子的抽屉里偶然翻到了他以前写的一些情书。