It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it.

我们不可能确定是两个大陆在向相反的方向移动，还是一个大陆是静止的，而另一个大陆在漂移。

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Today's methods of birth control make it possible for a couple to choose whether or not to have a child.

如今的节育措施使一对夫妇可以选择是否要生育孩子。

《柯林斯英汉双解大词典》

The decision whether or not to salvage the wreck was not an easy one, although an excavation in 1978 had shown that it might be possible to raise the hull.

决定是否打捞沉船并不是一件容易的事，尽管在1978年的一次挖掘表明，打捞船体是有可能的。

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or hepatitis are reported, but other possible infections often are not.

VOA: special.2010.02.10

Similarly, it's not possible to picture or imagine what it's like to have fainted and be completely unconscious with nothing happening cognitively.

同样的，要想象,完全不省人事的昏迷,没有任何知觉的感觉也不可能。

耶鲁公开课 - 死亡课程节选

it's not always easy or possible

做起来没那么简单，也不太可行，

临时抱佛脚？也做过 - SpeakingMax英语口语达人

Secondly, an evaluation should be made as to whether or not it is possible to maintain necessary safeguards contained in the conditions of certain approved export licenses.

CENTERFORSECURITYPOLICY: "US Relations With China"

It may or may not become possible when the fighting is over to devise an international zone between Egypt and Israel which might serve as a secure additional route between the Red Sea and the Mediterranean.

ECONOMIST: Splenetic Isolation | The

And indeed, Jake, if you had looked at this just through a static, unidimensional lens 45 days ago and you and I had been discussing whether or not it was possible that the Qaddafi regime would lose control over half the people in his country, we would say probably not.

WHITEHOUSE: The White House