Tom met Mary at a party, and they fell in love at first sight.

汤姆在一次聚会上遇到玛丽，两人一见钟情。

《新英汉大辞典》

A man's neediness stems from falling in love at first sight.

男人的需求源于一见钟情。

youdao

I think you can find out if there is a possibility of romance within the first second of meeting someone, so-called love at first sight.

我想你就能知道是否有可能和某个人相见一两次就恋爱，也就是所谓的一见钟情。

youdao