I persuaded him without avail.

我劝是劝过他了，但没有用。

Nicola: I've proposed to four different men without avail.

Nicola：我向四个不同的男人求过婚都没有成功。

She tried to argue herself out of the infatuation, but without avail.

她想说服自己摆脱迷恋，可是没成功。

Much to my regret that we have made repeated application for payment of this amount without avail.

我们多次去函请求结清这笔账款而无任何结果，为此我们非常遗憾。

Weapons are of no avail without the people who use them.

只有武器而没有使用它们的人，武器是空的。

The supporting evidence was strong on its own: African-American residents without water had made repeated requests over a period of almost 50 years to remedy the inequity, to no avail.

支持证据本身就很强有力：没有水的非裔美国居民在近50年里曾经多次要求纠正不公平待遇，但是没有结果。

The complaints say that purchasers who have used up or thrown out the drugs without keeping receipts won't be able to avail themselves of the company's recall.

投诉称，用光或者扔掉药品并没有收据的购买者将不被纳入强生公司的召回范围中。

Mere learning is of no avail without practise. According to the Buddha, the learned man who does not practise the Dhamma, is like a colourful flower without scent.

只学习而不修行是没有用的。依佛陀的教导，很懂佛法学问而不修学佛法的人，就像一朵颜色五彩缤纷却没有香味的花。

In the case of confrontation, without renewal of resources, a small amount of avail-able resources still remains for some user on the network when there is no resources distribution between users.

在对抗环境下，即使不使用资源更新策略，资源分发停止分发传播时，网络中仍会残余少量的可用资源供部分用户使用；