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1·Littered on the grass, we seemed dingy, urban riff-raff. We defiled the scene, like sardine-tins and paper bags on the seashore.

我们却好像是一堆肮脏的城市垃圾，被胡乱丢在草地上。如同海滩上的纸袋和沙丁鱼罐头盒一样败坏风景。

2·In 1994, Rudolf Raff and colleagues at Indiana University in the USA decided to use genetics to put a number on the probability of evolution going into reverse.

1994年，美国印第安纳大学的鲁道夫·拉夫和他的同事们决定用遗传学的方法来计算进化发生逆转的概率。

3·These people give me the creeps. Riff raff!

这些人使我起鸡皮疙瘩。真是一群痞子！

4·The unofficial Maker Faire mascot is this robotic giraffe, known as the Rave 'raff.

非官方的设备费尔吉祥物是这个机器人长颈鹿，因为狂欢'拉夫称。

5·Littered on the grass, we seemed dingy, urban riff-raff. We defiled the scene, like sardine -tins and paper bags on the seashore.

我们呢，却好像是一堆肮脏的城市垃圾，被胡乱丢在草地上，如同海滩上的纸袋和沙丁鱼罐头盒一样败坏风景。