1.trade ideas 交換意見
They say there are few places in this city where young people can hang out for hours and just trade ideas.
他們說，這座城市很少有地方能讓年輕人一起呆上幾個小時，說說彼此的想法N]Le~Ffap~。

2.in unison 同時；齊聲；一致
Sarkozy warned on Monday that the E. U. would act in unison against Russian if its troops do not pull out of Georgia.
薩爾科奇18日告誡稱，如果俄羅斯部隊不撤出格魯吉亞，歐盟便要一致對付俄羅斯%XagEEDq-rxxJ&Xy。

3.look back 回首；回顧
As I look back, I see that most of my most vivid memories come from the early times when a lot of this music was new to me.
再回首，我認為記憶中最鮮活的那一部分仍舊停留在當初，我剛開始接觸到這些音樂之時Avh4n#i4pye。

4.get behind 支持
The crowd really got behind them and cheered them on.
觀眾真的很支持他們，很努力地在為他們加油e@y_+Owx9WszaZ.|。