be necessary for 有必要 ; 是…需要的 ; 对……有必要 ; 对…来说…很必要
hardly be necessary 大可不必
be necessary to do sth 有必要做某事 ; 要做某事
be necessary to 对…有必要
be necessary for sb 对某人来说是很需要的 ; 必要的
will be necessary to use 将必需用到
Oh will not be necessary 呵呵没这个必要
Rope may be necessary 可能需要绳索保护的山路
Well, I don't imagine that will be necessary. Leastways, I hope not.
我想那是不必要的。至少,我希望不是。
It may be necessary to buy a new one.
也许有必要买个新的了。
Some adjustment of the lens may be necessary.
可能需要调整一下镜头。
He said southern defenses around the fort were so strong that a major military effort would be necessary.
VOA: special.2009.08.06
This material will be necessary to do the listening exercises for the course, which is sort of the backbone of the course.
做听力练习时我们必须使用这些材料,听力训练是课程的核心内容
For, as Rutherford has shown the assumption of the existence of nuclei, as those in question seems to be necessary in order to account for the results of the experiments on large angle scattering of the alpha rays.
因此卢瑟福,提出了原子核存在的假设,这些关于问题的假设对于,解释阿尔法粒子的,大角度散射是有必要的。
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