Whether or not we're successful, we can be sure that we did our best.
不管成功与否，我们确已尽了最大努力。
We're debating whether or not to go skiing this winter.
我们盘算着今年冬天是否去滑雪。
This blood test will show whether or not you're immune to the disease
这个血检会显示你是否对这种疾病具有免疫力。
They now have two weeks to decide whether or not to buy
现在他们有两周时间决定到底买还是不买。
It is debatable whether or not antibiotics would make any difference
抗生素能否起到什么作用还无法定论。