there it is1 used when you have found something or someone that you are looking for 原来它/他们等在这儿 Have you seen my keys anywhere? Ah, there they are. 你见过我的钥匙吗？啊，在这儿。
There you are. I’ve been looking for you. 原来你在这儿，我一直在找你。
→ there it is/there they are etc at there2(SPOKEN SECT)
2 used to say that nothing can be done to change an unsatisfactory situation 〔某状况〕无法更改 It’s all very sad, but there it is. There’s absolutely nothing any of us can do about it. 这事固然令人伤心，但也只能这样。我们谁都无能为力。
→ there it is/there you are/there you go at there2(SPOKEN SECT)