合影take a group photo/picture; group photo/picture
后勤administrative affairs of institutions and organizations
后台backstage support; backstage
呼声cry; opinions and requirements of the masses
呼应work in concert with; coordinate
呼风唤雨summon wind and rain; stir up trouble
哄堂大笑the whole room rocking with laughter
横harsh and unreasonable; unexpected
胡思乱想go off into flights of fancy
赫然awesomely; be terribly angry
鹤立鸡群like a crane standing among chickens -- stand head and shoulders above others
黑白black and white; right and wrong