'Now remember boys and girls,' said the science teacher. 'You can tell a tree's age by counting the rings in a cross section. one ring for each year.' Tom went home for dinner and found they were having a jelly roll for dessert. 'I'm not eating that, Mum,' he said, 'It's five years old!'

“孩子们，现在要记住，”理科老师说，“你们可以数一数一棵树的横截面上的年轮，以此来知道这颗树的年龄。一个年轮就是一岁。” 汤姆回家吃晚饭，发现甜点是一个果冻卷。“我不吃那个，妈妈，”他说，“它五岁了！”