1. The study of a foreign language is necessarily difficult.
    学一门外语必然很困难。

2. Though they look exactly the same, clones are not necessarily exact copies.
    尽管克隆的人看上去一模一样，但他们并非必定是一模一样的翻版。

3. This commitment does not mean surrendering our total selves to each other; nor does it imply that the relationship is necessarily permanent.
    这种承诺并非意味着完全把自己交给对方，也并不是说这一关系一定要永远不变。

4. A good joke does not necessarily evoke a hearty laugh.
    一个好的笑话并不总能让人们会心的大笑。

5. And we get paid for it and praised for it, which produces good feelings we may not necessarily be able to attain in other parts of our lives.
    而且我们还能因此得到报酬和表扬，这会给我们带来我们不一定能从生活的其他方面获得的良好感觉。

6. "The teacher wasn't necessarily there with them every time they did the exercise," Tinetti notes.
    蒂内提特别提到，"他们每次练习时，并非一定要教练陪在身边。"