It's a hard work, so you must work hard.
这是一件艰苦的工作，因此你必须努力去做。
你必须努力工作。
First of all, you must work hard.
首先，我必须完成我的工作。
You must work hard at your lessons.
你应该努力学习功课。
You must work hard in order to succeed.
为了要成功，你必须努力工作。
The problem is that you must work hard.
问题是你必须努力工作。
You must work hard to ride out a storm.
你们必须努力工作以渡过难关。
You must work hard next term, mustn't you?
下学期你应该努力学习，对吗？
No matter where you go, you must work hard.
不管你上哪儿，都要努力工作。
If you want to succeed, you must work hard.
要想成功，就得艰苦奋斗。
You must work hard and so must your brother.
你必须努力学习，你弟弟也一样。
To acquire great success, you must work hard.
要获得成功，必须努力。
You must work hard to achieve all your goals.
你必须努力实现你所有的目标。
You must work hard to emulate your sister's success.
你必须努力工作，赶上你姐姐的成就。
You that if you want to succeed, you must work hard.
你应该认识到要想成功，就必须努力工作。
You must work hard, otherwise you will fail the exam.
你必须努力学习，否则你将考试失败。
You must work hard before you can learn English well.
你必须刻苦学习，才能学好英语。
You must work hard to emulate your brogher's success.
你必须努力工作，赶上你哥哥的成就。
You must work hard to emulate your brother's success.
你必须努力工作，赶超你哥哥的成果。
If you want to get ahead in life, you must work hard.
如果你想在生活中成功，你必须付出努力。
You must work hard, then you’ll be successful in future.
你必须努力工作，才能在以后的工作中成功。
You must work hard, then you'll be successful in future.
你必须努力工作，才能在以后的工作中成功。
You must work hard to acquire good knowledge of English.
你必须努力学习英语，以求精通。
You must work hard to improve your English, mustn't you?
你必须努力学习来提高你的英语水平，不是吗？
Wow! Now it's not easy to find a job. You must work hard.
哇！现在找份好工作不容易。你一定要努力工作。
If you go to college, you must work hard, not fool around.
你要是上大学，就得好好学习，不能虚度光阴。
You must work hard; otherwise you will not learn English well.
你必须用功，否则就学不好英语。
You must work hard; otherwise you will not learn English well.
你必须用功，否则就学不好英语。
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