in study
carefulness
not afraid of bearing being dirty, tired,or laborious
class leader
broaden the horizon
准确翻译下面几个词：在学习上（注意介词）；细心（名词）；不怕脏,累,苦；班干部；拓宽视野；
in study
carefulness
not afraid of bearing being dirty, tired,or laborious
class leader
broaden the horizon