你一定要努力学习，不然就会失败。

You must study hard; or else you will fail.

youdao

你一定要努力，并跟上这些生活细节。

You have to try and keep up with that stuff.

youdao

再一次相信伱，你一定要努力。

Once again, I believe you, you must strive to.

youdao

你一定要努力，因为这不是一个普通的周末。

Promise me you will make an effort, for this is no ordinary weekend by any stretch of the imagination!

youdao

如果你真想当一名演员，你一定要努力工作。

If you're serious about becoming an actor, you must work hard.

youdao

你一定要努力工作，就能很快得到一辆新车的。

Make sure you work hard, and you can get one soon.

youdao

哇！现在找份好工作不容易。你一定要努力工作。

Wow! Now it's not easy to find a job. You must work hard.

youdao

这就是为什么你一定要尽最大努力去找别人和你一起说。

That is why you should make every effort possible to find somebody to speak with.

youdao

喜欢一个人，一定要让对方知道。也许得不到答案，至少你努力过，不必后悔。

Love a person, you must let them know. Maybe not the answer, at least you tried, do not have to regret.

youdao

你一定要咬紧牙关，努力工作。

You have to grit your teeth and work hard.

youdao

你一定要向生活中想要的东西努力。

Make sure you are really reaching for what you really want in life.

youdao

儿子，我知道你为了成功得努力工作，但你一定要尽量多花时间陪陪家人。

Son, I know you have to work hard to be successful, but make sure you spend as much time with your family as possible.

youdao

儿子，我知道你为了成功得努力工作，但你一定要尽量多花时间陪陪家人。

Son, I know you have to work hard to be successful, but make sure you spend as much time with your family as possible.

youdao