原理: principle, theory...
用得着: to be able to use, useable, to have a use for sth, (in interrogative sentence) to be necessary to...
戏曲: Chinese opera...
协同: to cooperate, in coordination with, coordinated, collaborate, collaboration, collaborative...
青蛙: frog, (slang) ugly guy...
叫作: to call, to be called...
梳: a comb, to comb...
劝: to advise, to urge, to try to persuade, to exhort, to console, to soothe...
深情厚谊: deep friendship...
另外: additional, in addition, besides, separate, other, moreover, furthermore...
