“开心一点”的英文翻译是要根据语境来的,如果是劝人开心、乐观振作,可以用如下句子：
Pull yourself together.振作起来.Keep your chin up.别灰心.
Don't let it get you down.It will be over with soon.别为此烦恼.事情很快就会过去的.Don't be so miserable!别愁眉苦脸的. Loosen up!It's not worth getting upset about.放松点儿!不值得为这件事苦恼. Hang in there.Things will get better.坚持住,情况会好起来. Keep smiling!Things will calm down.乐观一点,事情会平息下来的. Things are never as bad as they seem.事情往往不像看上去的那么糟.Let's look on the bright side.我们来看看它好的一面.Every cloud has a silver lining.再黑暗的地方也有一线光明. When god closes a door,he opens a window.山不转水转.Tomorrow is another day.有明天就有希望.