Jack pleaded with his mother; but all unavailingly.

杰克恳求他的母亲； 但一切都无济于事。

One night, because of two swift bangs down-stairs, which Anthony fearfully but unavailingly investigated, they lay awake nearly until dawn asking each other examination-paper questions about the history of the world.

一天晚上，由于楼下传来两声急促的巨响，安东尼胆战心惊但徒劳无功地进行了调查，他们几乎一直醒着直到天亮，互相问着关于世界历史的试卷问题。