cough up

动词 cough up:

1. give reluctantly
   同义词：pony up, spit up
2. discharge (phlegm or sputum) from the lungs and out of the mouth
   同义词：expectorate, cough out, spit up, spit out

1. He'd been coughing up blood.
   他那时一直在咳血。
2. He had to cough up all he knew.
   他不得不说出自己所知道的一切。