at best

phr

• ① (即使)抱最乐观的看法;充其量(★【口】通常不用the,但强调形为at the very best)
  • He is at (the) best a second-rate actor.他充其量是一名二流演员。
  • You can earn $500 a month here at best.你在这里一个月顶多赚五百美元。