商讨: to discuss, to deliberate...
明确: clear-cut, definite, explicit, to clarify, to specify, to make definite...
背后: behind, at the back, in the rear, behind sb's back...
羊: sheep, goat...
涮火锅: eat Chinese fondue...
趴: to lie on one's stomach, to lean forward, resting one's upper body (on a desktop etc), (Tw) percent...
酷: ruthless, strong (e.g. of wine), (loanword) cool, hip...
除夕: lunar New Year's Eve...
专著: monograph, specialized text...
中学: middle school...