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
study Perseveringly 坚强的意志和持之以恒
This aim can be realized only by working hard and perseveringly.
这个目标只有坚持不懈地努力工作才能达到。
Students should straighten your backs, study hard, and work hard perseveringly, using your own hands to build up your homeland more splendid. We must have such confidence and courage.
同学们要挺起不屈的脊梁，努力学习，艰苦奋斗，用自己的双手把家园建得更加美好，我们要有这样的信心和勇气。
We will be perseveringly offering more cooperation and service to our clients and we sincerely welcome our old and new clients to visit us.
我厂将一如既往地向客户提供更多的合作与服务，并欢迎新老客户光临惠顾。
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