Merely "Ban movies with smoking scene" is not enough and not necessary.
仅仅禁止电影中出现这些镜头是不够的也是不必要的。
It is not, in principle, necessary for a biological system to age and die.
原则上来说，生物系统的衰老和死亡都不是必然的。
Some of these interruptions are necessary and others are not.
有些干扰是必需的，其他则不是。
I only want one apple, and if one apple is worth nothing then it is not necessary for me to pay you.
我只要一个苹果，如果一个苹果一分钱也不要的话，那我也就没必要给你钱了。
Knowing how the Universe began and if a creator was necessary, or not.
认知宇宙是如何开始的并且造物主是否是必须的。
Circular references are not always bad and, in fact, are sometimes absolutely necessary.
实际上，循环引用也不总是有害的，有时它是完全必需的。
If you must hold yourself up to your children as an object lesson (which is not at all necessary), hold yourself up as a warning and not as an example.
如果你必须要把自己看成是孩子的实物教材(其实根本没有必要)，那就把自己当成是孩子的一个警示吧，而并非是范例。
It's too expensive and just not necessary.
太贵了，而且没有必要。
And so, while gossip may not be nice, it may have once been necessary.
所以，虽然流言蜚语可能不是好事情，但它曾经却是“必不可少“的。
Texting and telephoning may be necessary in modern friendship, but alone, they are not sufficient.
在现时代的友谊中，文字和电话也许是必要的，但仅此还不够。
Pen, paper, and secretary are not necessary, which surely makes me more productive.
钢笔、纸张以及个人秘书都不再重要，这让我的效率大大提高。
To counter denial, tell your child as often as necessary that yes, Grandpa is dead, and will not return, but those who love him will always remember him.
为了应对孩子否认事实的态度，你需要反复的跟他说：“是的，爷爷已经去世了，再也不会回来了，但我们会记住他的，所有爱他的人都会记住他。”
Know that it's not necessary to try and change your personality.
要知道没有必要去试图改变你的个性。
Embellishment and fluff are not necessary.
华丽的润色是完全没有必要的。
Don't put in extra bells and whistles if it's not necessary.
不必要的话不要放进去，多余的铃声和口哨声。
It is not necessary to choose between English and one's native tongue.
没有必要在英语和母语之间做出选择。
Necessary prep work does not get done and decisions are delayed.
必要的准备工作无法完成，决策延迟。
No, that's not necessary. I will come and take a look myself.
没有必要，我将亲自来看一看。
And it's like, Well, I'm not sure that's really necessary.
这就好比，额，我不确定是不是真的有必要这么做。
When discontinuity marker is necessary and when not.
当不连续标记是必要的，不用时。
This will not be easy to achieve, but it is both necessary and possible.
这不是轻易就能达到的，但是却是必需和可能达到的。
This is not necessary and will attract a fee.
这是不需要的而且会产生费用。
However, that's a matter of preference and it's not absolutely necessary.
不过，这是一个见仁见智的问题和它不是绝对必要的。
And not all of this exposure may even be necessary.
然而，并非所有的暴露都是必须的。
Repeat steps 14 and 15 to add the value not necessary.
重复步骤14到15，添加值not necessary。
Other people, however, think that a test of written English is enough and test of spoken English is not necessary at all.
但是另一些人认为测试书面英语就够了，英语口语测试根本就没有必要。
Do not forget personal documents. Your spectacles and medicine if necessary.
不要忘记私人文件，若必要别忘了带眼镜、必备药品。
I made a mistake so it's necessary to punish myself over and over again and not let go at any cost.
我犯错误了，所以很有必要不惜一切代价，一遍一遍的惩罚自己，不能就这么算了。
I made a mistake so it's necessary to punish myself over and over again and not let go at any cost.
我犯错误了，所以很有必要不惜一切代价，一遍一遍的惩罚自己，不能就这么算了。
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