The search proved difficult, for the puma was often observed at one place in the morning and at another place twenty miles away in the evening.

事实上搜寻工作很困难，因为常常是早晨在甲地发现那只美洲狮，晚上却在20英里外的乙地发现它的踪迹。

During the journey, their boat began to sink.

途中，船开始下沉，

No one can avoid being influenced by advertisements.

没有人能避免受广告的影响。

No one discovers a rarity by chance.

无论是谁都不会一下子就发现一件珍品。

It has always been a mystery to me who city dwellers, who appreciate all these things, obstinately pretend that they would prefer to live in the country.

城里人对这一切心里很明白，却偏要执拗地装出他们喜欢住在乡村的样子，这对我来说一直是个谜。

Sitting down on a dilapidated wooden fence near the field, we opened a couple of tins of sardines and had a picnic lunch.

我们在田边一堵东倒西歪的篱笆墙上坐下来，打开几听沙丁鱼罐头，吃了一顿野外午餐。