反过来说，作曲并不一定要学习作曲理论。
Studying music composition is not a prerequisite for composing.
一周要规定多长时间学习历史和在什么年龄一定要学习历史？
For how many hours a week should history be taught in schools, and to what age should it be made compulsory?
与第 (2) 种方案相同，但我一定要学习此课程才能毕业 --我 必须加入这个班。
Same as (2) above, but the class is required to graduate -- I must get into it.
但是既然犯了错误就要改正，所以，通过考试我也想了很多以后一定要学习的东西。
But since the mistake is correct, so I want to pass the exam, after a lot of things must study.
今天差点因为不会劳动而再次被赶出来，同学们，你们会做家务吗，不会做的一定要学习做家务啊！
Today almost because Labour will not again be driven out, the classmates, you will do any housework, don't d!
在长时间学习后，一定要做眼保健操来放松眼睛。
Be sure to do some eye exercises to relax your eyes after you study for a long period of time.
教育的意义是学习事物如何运作，不一定要在正式环境中。
Education - in the sense of learning how things work, not necessarily in a formal setting.
有不止一种的学习方法，所以，一定要在你的训练课程中吸收不同的方法。
There's more than one way to learn, so be sure to incorporate different methods in your training.
我们一定要充分发扬祖国的文化传统，同时我们也懂得，要学习和借鉴世界先进的文明。
We must bring into full play the strength of China's cultural heritage and at the same time learn from and draw upon the fine achievements of other civilizations.
也就是说，你一定要融入这个学习的进程。
In other words you need to be involved in the learning process.
而且，一定要尽可能多读些剧本——特别是你选定的那种类型的剧本——那会教你最近的格式编排的变化点，向那些比你成功的剧本学习。
Also, definitely read as many scripts as you can — especially in the genre you have chosen — which will show you the recent formatting changes and scripts that are more successful than yours.
像许多常年混迹于电信行业中的开发人员一样，我所学习到的是，若实现一个电话交换，则一定要在40毫秒内发出拨号音，这是一个难以实现的需求。
Like many other developers with a history in telecom, I learned that when you build a telephone switch, regulations say it must provide dial tone in 40ms, a difficult requirement to achieve.
一旦您使用了这个工具，一定要确保花一定的时间来学习一些很出色的部分。
Once you've used the tool for a bit, be sure you take the time to learn some of the finer points.
那次只是观光旅游，但是在旅游的过程中我下定决心一定要来美国学习英语。
That time I was here on vacation——just sightseeing, but during that trip I decided that I would come to the United States and study English.
在学习AIX中用来创建、修改和维护用户和组的命令之前，一定要了解在幕后发生的情况。
Before going into the commands to create, modify, and maintain users and groups in AIX, it is important that you know what is happening behind the scenes.
因此，如果你想要吃减肥药，一定要先学习一下，阅读说明书，和你的医生或药师讨论，还要查询FDA网站，阅读关于这种药品的可能的安全问题和产品召回说明。
Read labels and talk with your doctor or pharmacist. Also check the FDA Web site for alerts about safety concerns and product recalls.
当你专注于一件最重要的任务时,没必要一定要持续工作.学会委任.教导孩子们帮助处理日常琐事.学习如何更有效的与同事工作,与家人相处.
Teach your children to help with everyday chores. Learn how to work with coworkers and family members in an effective way.
然而，由于一种不完全的学习情况，出自你的高我的一个计划你一定要重复一种经验。
However, due to an incomplete learning situation, your higher self lays out a plan whereby you must repeat an experience.
因此，为了使自己做出的努力更有效率和留一些时间去玩耍，我一定要做一个好的学习计划。
Therefore, I must make a good plan for my study to make the effort effective and set sometime aside for playing.
我们大家快乐极了，也感谢学校领导和老师为我们精心准备的六一活动，我们也一定要认真学习来报答领导们的付出。
We are all happy, but also thanks to school leaders and teachers for our carefully prepared six one activities, we must also carefully study to repay the leadership of the pay.
因此一定要多学习预防医学知识，养成良好的生活习惯。
Because this must learn precautionary medicine knowledge more, the habits and customs with good nurturance.
还有就是对学习中产生的困难，一定要坚持战胜，不要气馁。
There is produced in learning difficulties, we must adhere to overcome, do not despair.
鼓励一定要及时，孩子在学习榜样中把某件事做好了，家长应马上表扬。
To encourage must be timely, an example of a child in learning to do something, and parents should immediately recognize.
今后，我一定要向，贝多芬等生活的强者学习，遇到困难，不低头，不退缩，为了理想，为了光明，顽强攀登，向着光辉的顶峰前进。
In the future, I have to, Beethoven and other living survivor learning difficulties do not bow their heads, not retreat, in order to ideals, to bright, tough climb toward the pinnacle of glory ahead.
因此考生在开始复习时一定要有坚定的信心，要充分调动学习的积极性，保持情绪饱满。
Therefore, the candidates must have a strong confidence in the beginning of the review, to fully mobilize the enthusiasm of learning, to maintain full of emotions.
我很感激他们，因此我一定要努力学习，这样才能回报他们的爱。
I am so thankful to them, so I must study hard, for the purpose of returning their love.
可以学习得晚，但一定要睡觉。如果大脑正常运作的话，就得至少休息七个小时。
Study late, but get to bed. Get at least seven hours of sleep if you want your brain to function normally.
可以学习得晚，但一定要睡觉。如果大脑正常运作的话，就得至少休息七个小时。
Study late, but get to bed. Get at least seven hours of sleep if you want your brain to function normally.
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