It was Paul's first important lesson as a student of chemistry.

The book includes 25 Lessons for Life: Lesson 1: There is no free lunch. Don't feel entitled to anything you don't sweat and struggle for

本书共包括25堂“人生课”：第一课，没有免费的午餐。别以为可以不劳而获。

Miss Green: Open your books and let's study Lesson One. Lucy, will you read the new words, please?

格林小姐：打开书本，我们来学习第一课。露西，你可以读一下新单词吗？

We had a good schooling those first DAYS ang NIGHTS.

我们学到了那些日日夜夜中很好的第一课。

Since I'm nervous about my first class.

因为我对我的第一课感到很紧张。

Topside lesson number one: fashion means suffering.

甲板教学第一课：时尚意味着受苦。

The first hard lesson many beginning Java developers learn is that if the class name and file name don't match exactly ( including upper-and lowercase), the class won't compile.

许多刚开始使用Java的开发人员学到的第一课是如果类名与文件名不完全匹配（包括大小写），则类无法编译。

Discussion on Influence to the Girl Students Middle School of the Physique Lesson

形体课对中学女生影响的探讨大学第一课

I learned the first lesson from my own students.

第一课是我的学生们给我上的。

Tom: This is lesson one, isn't it?

汤姆：这是第一课，对吗？

So lesson number one is go back to bed.

所以第一课就是回去睡觉。

In this term, environmental protection English class begins.

这段教材，就是我们环保英语五十句的第一课。

Lesson one. You're old, accept it.

第一课你老了得认命

This is the first lesson that I learned.

这就是我当时学的第一课。

For example, the first lesson of the day is maths, but the teaching method is very special.

例如,今天的第一课是数学,但教学方法很特别。

Lesson One: The Rich Don't Work For Money

第一课：富人不为钱工作

The first lesson that I learned will never forgotten.

我永远不会忘记我学过的第一课。

The first lesson that I learned will never be forgotten.

我所学的第一课永远也忘不了。

First lesson: Stick them with the pointy end.

第一课：用尖的那端去刺敌人.

Lesson one Excuse me! Lesson three Sorry, sir.

第一课对不起！第三课对不起，先生。

Cost:$ 30 per person for a half-hour lesson. First lesson half price.

费用：半小时课每人30美元。第一课半价。