Who can tell if this promise decided the doctor?

谁能说医生对这个承诺是否肯定呢？

youdao

He couldn't tell if she was laughing or crying.

他弄不清楚她是在笑还是在哭。

《牛津词典》

Only time will tell if the treatment has been successful.

只有时间才能证明这种疗法是否成功。

《牛津词典》

Banner says coaches can tell if a player is only trying to improve his statistics or wants to help his team win.

VOA: special.2010.06.02

That's important, too, because you need to be able to tell if the virus is present in the human population.

这一点也非常重要,因为你要能够分辨出,人群中是否有人感染了天花病毒

耶鲁公开课 - 生物医学工程探索课程节选

people are going to tell if you're a tourist because you're going to stop suddenly.

人们可以看出来你是个游客，因为你会突然停下脚步。

在纽约的感受 - SpeakingMax英语口语达人

Time will tell if the effort proves too little, too late, according to Trott.

FORBES: Booking Losses

Only time will tell if it's a real challenger to the laptop and netbook.

WSJ: iPad Opens a New Frontier

It was easy to tell if companies made as much money as they said.

FORBES: Financial Scandal��s Link to the New Deal