Don't bother

1. Don't bother. 省省吧/不劳你大驾了。2. Come again? 再说一遍（我没听清）？3. Just hear me out. 听我说完。4. You're beating a dead horse. 你是在浪费口舌/你说再多也没用。5. There's nothing I can do about it. 我也无能为力。