----it is as difficult to change a man 's nature as to change lakes and hills.
----old in years but young at heart
----one oar hits all the people in the boat
----little sparks can lead to disaster
----to play a flute before a cow
黄梁一梦-----To have had a dream before the yellow rice is cooked.
世外桃源-----A place out of this world.
铁杵成针-----A needle out of a sreel rod.
趾高气扬-----To take high steps and forceful breaths.
胸有成竹------There is bamboo in his chest.
:o :o :o