1. 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。
2. and the sharp arrows of unavailing remorse struck home to his heart. 那徒劳无益的悔恨如支支利箭深深地刺进他的心窝。
3. I am afraid you have been long desiring my absence, nor have I any thing to plead in excuse of my stay, but real, though unavailing, concern. 我恐怕你早就希望我走开了吧，我实在没有理由待在这儿，不过我无限地同情你，虽然这种同情无济于事。
