All our protests were unavailing .

我们所有的反对意见都毫无作用。

Bitter but unavailing were my regrets .

我的懊悔是痛苦而无益的。

Hurstwood heard the details of the weary and unavailing search that evening .

那天晚上，赫斯渥听到了这次劳而无获的寻找的详细情况。

His best efforts , however , proved unavailing and the child died .

然而，他所有的努力都无济于事，女儿还是死了。

Silent awaiting would turn out to be unavailing .

默默等待将要变成徒劳。