hit on

英 [hɪt ɒn]

美 [hɪt ɑːn]

突然想出（主意或解决办法）; 对…进行性挑逗

柯林斯词典

PHRASAL VERB 突然想出（主意或解决办法）
If youhit onan idea or a solution to a problem, orhit uponit, you think of it.
1. After running through the numbers in every possible combination, we finally hit on a solution.
  将这些数字进行各种可能的排列组合后，我们终于找到了答案。
PHRASAL VERB 对…进行性挑逗
If someonehits onyou, they speak or behave in a way that shows they want to have a sexual relationship with you.
1. She was hitting on me and I was surprised and flattered.
  她在挑逗我，这让我感到既惊讶又受宠若惊。