study assiduously and perseveringly 持之以恒地刻苦学习 ; 坚持不懈的努力学习
work hard and perseveringly 艰苦奋斗 ; 大干苦干
apply oneself perseveringly to 锲而不舍地致力于
perseveringly detail 坚忍不拔地
study Perseveringly 坚强的意志和持之以恒
study y assiduously and perseveringly 持之以恒地刻苦学习
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