不是必要的

In particular, the acetabular component anteversion can be difficult to determine on plain radiographs and as this is frequently an issue resulting in instability, accurate assessment is required.7

特别强调的是，髋臼假体的前倾在平片上难于评估，因此这往往是导致不稳定的潜在因素，精确的测量其角度是有必要的。

This is unnecessary and preventable and each one of us must do our part to avert this disaster.

这是不必要的，也是可以阻止的。我们每一个人都应该贡献自己的力量。

Peter Damian, we should consider it a blameable and needless curiosity to inquire about those things that the Evangelists did not deem it advisable to relate, and, in particular, about the parents of the Blessed Virgin Serm.

如果我们要听从警告的圣彼得大棉，我们应该认为它是一个blameable和不必要的好奇心，询问这些事情福音并不认为有可取涉及，尤其是对父母的祝福维尔京

Even whit all these resources this mission will not be a cakewalk so careful planning and coordination is needed.

虽然拥有这样的资源这个任务也不会是一个轻松任务，所以小心的计划和协调作战是非常必要的。

What's worse, they think that the temperature condition is not necessary for seeds to come into leaf and that plants can also grow well without fertilization.

学生对於植物生长的另有概念包括将根与茎的名词定义错误，认为植物是「先长茎再长根」或「先长果实，后开花」；并对植物器官的功能不熟悉；缺乏植物的「花」、「果实」具有传宗接代等繁殖概念；「温度」条件对种子发芽而言是非必要的；植物有「施肥」就长得更好，没有施肥也不会怎样；知道植物可以用种子繁殖，除了种子以外可以繁殖的器官学生多数只看过落地生根用叶子繁殖，缺乏更多的实际经验。

War is the method, not the purpose, and it's the continuation of politics.

在必要的时候，一场针对性的、有效的战争是必须的。战争是手段而不是目的，它是政治的延续。

If you are going to be successful at opening side bars, you will do it within two minutes; otherwise, you are causing unnecessary wear on your picks not to mention wasting your time.

如果你是怎样获得成功开幕方酒吧，你会做两分钟；否则你对你造成不必要的磨损镐遑浪费大家时间。

The information on sex-offender registries should be held by the police, not published online, says Ms Tofte, and released "on a need-to-know basis".

性侵犯者的信息资料库应交由警察保管，而不是在网上公开，Ms Tofte说，除非是&公众有了解的必要&。

It is not just a matter of avoiding a needless provocation; Mr Abe should kickstart a long-overdue national debate about Japan's wartime responsibility.

避免不必要的挑衅不是解决问题的途径；安倍先生应当认真诚恳地对日本战争责任展开一场长久的全国性辩论。

I don't think it's necessary, but it depends on the motivations.

我不认为这是有必要的，不过这取决于动机如何。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。