In England, if you are under the age of eighteen, you're not allowed to drink in a public bar.

在英格兰(England)， 年龄在18岁以下(under the age of eighteen)的人则不允许(be not allowed to do)到公众(public)酒吧里饮酒。

Mr. Thompson used to go to a bar near his house, but he never took his son, Tom, because he was too young. Then when Tome has his eighteen birthday, Mr. Thompson took him to his usual bar for the first time.

汤普森先生过去经常(used to)到他家附近(near his house)的一个酒吧喝酒，但他从不带(take)他儿子，汤姆，因为他还太小(young)。当(When)汤姆过18岁的生日(birthday)时，他第一次带儿子去了他经常去的酒吧(usual)。

They drank for half an hour, and then Mr. Thompson said to his son, "Now, Tom, I want to teach you a lesson, you must always be careful not to drink too much, and how to you know when you've had enough? Well, I'll tell you. Do you see those two lights at the end of the bar? When they seem to have become four, you've had enough and should go home."

他们喝了半个小时(for half an hour)，然后(then)汤普森先生对(said to)他儿子说，"现在，汤姆，我会给你上一课(teach you a lesson)，你需要(must)小心(be careful)绝不能喝太多(not to drink to much)。那怎么知道你是否已经喝够多(you've had enough)呢？听着，我告诉你。你看见酒吧尽头(the end of the bar)的两盏灯(light)了吗？当他们看起来已经变成(become)四盏的时候，你就喝足了(had enough)，应该回家了。

"But, Dad," said Tom, "I can only see one light at the end of the bar."

"但是，爹"汤姆问，"我只(can only)看见一盏灯在酒吧尽头."