毫无结果

Their search for the plane is fruitless.

他们对飞机搜寻毫结。

After repeated but fruitless demands for payment,he brought a suit against the debtor.

在再三要求支付而毫结情况下,他向债务人提出诉讼。

This is a barren argument.

这毫结论。

Our first experiment was a blind alley, but the second one gave us very promising results.

我们第次试验毫结，不过第二次试验取得了十分可喜结。