blow用英语怎么说呢

"Please rest assured" is how you can say "请你放心吧" in English. This phrase is used to reassure someone that everything is going to be okay, and that they should not worry. It can be used in a variety of situations, such as when someone is feeling anxious or uncertain about something. For example, you might say "Please rest assured that everything will be taken care of" to reassure someone who is worried about a problem that needs to be solved.