The experts were now fully convinced that the animal was a puma,

专家们如今已经完全肯定那只动物就是美洲狮，

My nephew, George, has a money box but it is always empty.

我的外甥乔治有一个储蓄罐，但总是空空的。

I once spend an uncomfortable weekend which I shall never forget at his house.

有一次，我在他家里度周末，过得很不愉快。这事我永远不会忘记。

Frank could hardly conceal his excitement, for he knew that he had made a real discovery.

弗兰克几乎无法掩饰自己兴奋的心情，因为他明白自己发现了一件珍品。

Historians have long been puzzled by dots, lines and symbols which have been engraved on walls, bones, and the ivory tusks of mammoths.

长期以来，历史学家一直对雕刻在墙壁上、骨头上、古代长毛象的象牙上的点、线和形形色色的符号感到困惑不解。

When my wife nagged me to do something about it,

妻子喋喋不休让我想点办法。