众所周知，如果一个人身体不好，他就无法好好学习或工作，也不能舒舒服服地生活。
As we all know, if a person isn't in good health, he or she can't study or work well, or live comfortably.
父母往往警告孩子如果不好好学习，就只有做保姆或者清洁工。
Parents warn kids they will wind up as nannies or cleaners if they fail to study.
如果你对自己微薄的收入不满，你也许在小学时候并没有好好学习。
If you're feeling disgruntled about your measly paycheck, you might not have been paying enough attention in grade school.
如果我好好学习，掌握了大量的知识，将来我会很容易找到一份工作的。
If I study well, master lots of knowledge, it would be easy for me to find a job in the future.
一方面，如果学生经常玩电脑游戏，他们就无法好好学习，因为他们总是想着电脑游戏里面的东西而不是书本的知识。
For one thing, if students often play computer games, they can't do well in their study, because they always think about the things in computer games instead of the knowledge in books.
这个夏天你有没有计划开车外出旅游？如果有，干吗不好好学习一些有关驾车的安全知识，助你更好地安全驾驶？
Do you have any road trips planned for the summer? If so, why not review a few safety tips to help you travel safely?
乔纳森，如果你真想赢得奖学金、去埃及读书的话，你最好集中精力好好学习。加把劲儿！
Jonathan, you had better keep your eye on the ball if you want to win that scholarship to study in Egypt. Study harder!
我们家长总是说，如果你们不好好学习，就把你送到农村种地去。
Our parents always said if we don't study very hard, they will send us to village to do farming.
好好学习，否则不能通过考试。（如果你不好好学习，你不能通过考试。）
Study hard or you will fail to pass the exam. (If you don't study hard, you will fail to pass the exam. )
如果你只是想和会说广东话的朋友交流，那就好好学习广东话吧。
If you just want to communicate and be undertood by your friends who speak Cantonese, then study the Cantonese.
孩子们如果没有安全感，觉得自己不受重视，他们就不会好好学习。
Schwartz said. "Kids don't learn when they don't feel safe or valued."
孩子们如果没有安全感，觉得自己不受重视，他们就不会好好学习。
Schwartz said. "Kids don't learn when they don't feel safe or valued."
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