Since a number of parents in Centerville have complained that they are too busy to teach their teenagers to drive, some other instruction is necessary to ensure that these teenagers are safe drivers.
由于森特维尔有不少家长抱怨说，他们太忙了，没有时间教青少年开车，所以为了保证这些青少年的安全驾驶，一些其他的指导是必要的。
Sometimes it is necessary to say no.
有时候说“不”是必要的。
It is necessary to examine how the proposals can be carried out.
有必要调查一下怎样才能实施这些方案。
Vitamin D is necessary to aid the absorption of calcium from food.
从食物中吸取钙需靠维生素D的帮助。
They are only doing what is necessary to prevent wholesale destruction of vegetation.
他们只是在做为防止植被遭大规模破坏而必须做的事情。
To understand why they are doing it, it is necessary to know where they are coming from.
要理解他们为什么这样做，有必要知道他们的想法。
The United States will do that which is necessary to meet its obligations to its own citizens.
美国会尽其对国民应尽的义务。
It is necessary to learn to manage time and make good use of every minute.
有必要学会管理时间，好好利用每一分钟。
It is necessary to read the labels on the foods in a shop as well.
阅读商店里食品的标签也是必要的。
Remember that forgiveness does not mean it is necessary to become friends again with the person who upset you.
记住，宽恕并不意味着你必须和惹你心烦的人再次成为朋友。
"It is necessary to encourage kids to come up with new ways to make use of technology in school life," the head of the school added in the interview.
“有必要鼓励孩子们想出新的方法，在学校生活中利用技术。”该校负责人在采访中补充说。
It is necessary to do further study and development on the pine cone.
有必要对松果进行进一步的研究和开发。
In order to master grammar knowledge, it is necessary to practice as much as possible.
为了掌握语法知识，尽可能多做练习是有必要的。
Effective communication is necessary to instruct your dog about what you want it to do.
有效的沟通是必要的，这让你的狗狗明白你想让它做什么。
It is necessary to provide specific praise about actual actions performed and efforts made in the process.
对过程中的实际表现和付出的努力给予具体表扬是有必要的。
It is necessary to give others rights and chances to speak since the problem may concern them in different ways.
给别人说话的权利和机会是必要的，因为问题可能以不同的方式影响到他们。
In common with many of my classmates, I think it is necessary to update the multimedia equipment in the classroom.
和我的同学们一样，我认为有必要更新教室里的多媒体设备。
In addition, it is necessary to apply for graduation when you near the time that you will be completing your graduation requirements.
此外，当你快要满足毕业要求的时候，有必要去申请毕业。
In addition, it is necessary to apply for graduation when you're near the time that you will be completing your graduation requirements.
此外，在你即将完成毕业要求的时候，有必要去申请毕业。
To establish such a chronology, it is necessary to determine the relative amounts of land ice that existed at various times in the Earth's past.
为了建立这样一个年表，有必要确定地球过去不同时期存在的陆冰的相对数量。
One researcher shares Glenn Schellenberg's view that it is necessary to conduct long-term developmental studies to understand the effects of music training.
一位研究人员赞同格伦·舍伦贝格的观点，认为有必要进行长期的发展研究，以了解音乐训练的效果。
They argue that government action is necessary to curb Britain's addiction to unhealthy food and help halt spiraling rates of obesity, diabetes and heart disease.
他们认为，政府有必要采取行动来阻止英国人吃不健康的食物，并帮助防止肥胖率、糖尿病和心脏病发病率的螺旋式上升。
It is necessary to "cut one's teeth" on the non-glamorous parts of a field.
在一个领域中尝试做一些不那么光彩照人的工作来获得经验是有必要的。
It is necessary to make the right decision.
做，这对做出正确的决定是很必要的。
Do what is necessary to meet those needs.
做任何必要的事去满足这些需要。
It is necessary to do outside activities.
从事课外活动是很有必要的。
But sometimes it is necessary to use them.
但有时有必要使用它。
Tighter credit is necessary to quell inflation.
紧缩信贷是平息通货膨胀的必要手段。
Thus, it is necessary to look for other solutions.
因此，有必要寻找其他的解决方案。
This compiler is necessary to build a 64-bit kernel.
编译64位内核需要这个编译器。
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