be necessary to信息详情
对……来说是必要的；对……有必要
necessary───n.必需品；adj.必要的；必需的；必然的；n.(Necessary)（英）内塞瑟里（人名）
in necessary───必要时
if necessary───如果必要的话；如必要的话
be to be───即将成为
not necessary───不需要；不必要
necessary skills───必备技能
no necessary───没有必要
absolutely necessary───绝对必要；不可或缺；不可缺少；必不可少
to be───存在
It may also be necessary to get a new appraisal of the property.───可能还需要对该房产做个新的估价。
I kept the engine running because it might be necessary to leave fast.───我让发动机一直开着，因为可能需要快速离开。
It may be necessary to buy a new one.───也许有必要买个新的了。
Two vital ingredients seem to be necessary to make a scientist: the curiosity to seek out mysteries and the creativity to solve them.───能否成为一个科学家有两个关键因素：探求未知事物的好奇心和解决问题的创造力。
If changes are made to the tunnel after it has been built, it may be necessary to make a fan revision.───在风洞建成以后，如果要进行修改，那么风扇也可能要更新。
Dr. Shade said it would be necessary to be careful for a while, but he was confident that there was nothing to worry about.───谢德医生说小心一段时间是有必要的，但是他有信心没什么好担心的。
Installation is straightforward to the point that it might not even be necessary to specifically install anything.───安装十分简单扼要，它甚至可能都不需要特别安装任何内容。
In some cases it may be necessary to connect metal surfaces by means of a hard spelter solder which fuses at hight temperature.───某些情况下有必要用一种高熔融温度的强锌焊料来连接金属表面。
Against such a backdrop, it supposes to be necessary to make a study in the modern art of painting.───在这样的背景下，对纸在现代绘画艺术中的应用作一研究是有必要的。
If God did not exist, it would be necessary to invent Him.
It may be necessary to buy a new one.
It may not be necessary to go to the added expense of updating your virus software.
It will be necessary to pare this budget down considerably.
It will be necessary to proceed with caution.
It may be necessary to repeat the dose several times to effect a cure.
It may be necessary to make alternative arrangements.
It may be necessary to thin the sauce slightly.
It will be necessary to create a regime to monitor compliance with the agreements.