9PHRASE 不泄气;坚持不懈 If someone who is trying to achieve something hangs tough, they remain determined and do not give up, even when there are difficulties or problems. 不泄气;坚持不懈 [US, informal]
The White House is hanging tough for a good agreement to be reached.
白宫为达成一项有利协议寸步不让。
10 a tough row to hoe→see: hoe a tough nut→see: nut