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。
When you learn your lessons in school, you must work hard and not give up.
当你在学校学习时，你必须努力学习，不要放弃。
It isn't like a duck to water to learn a foreign language, so you must work hard.
学习一门外语不像鸭子会游泳那么简单，必须努力才行。
你必须努力工作。
To begin with, you must work hard at your lessons and be fully prepared before the exam. Without sufficient preparation, you can hardly expect to answer all the questions correctly.
首先，你必须努力学习功课，并在考试前做好充分的准备。没有充分的准备，很难正确回答所有的问题。
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。
No matter where you go, you must work hard.
不管你上哪儿，都要努力工作。
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。
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 emulate your brothe's achievement.
你努力工作才能赶上哥哥的成就。
You must work hard to acquire good knowledge of English.
你必须努力学习英语，以求精通。
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 to acquire a good command of a foreign language.
你必须努力用功，才能具备有良好的外语能力。
Not every effort will be successful, but every success you must work hard.
不是每一次努力都能成功，但是，每一次成功都必须努力。
On one hand you must work hard, on the other hand you should learn from others.
一方面你必须努力工作，另一方面你应该向其它人学习。
The story tells us that if you want to get something, you must work hard for it.
这个故事告诉我们如果你想获得一些东西，你必须为此努力工作。
The story tells us that if you want to get something, you must work hard for it.
这个故事告诉我们如果你想获得一些东西，你必须为此努力工作。
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