1. We work very hard.
    我们学习很努力，

2. We all knew about old Maggie´s hard life because she was so fond of talking about it.
    我们对马吉的艰辛生活都了如指掌，因为她很喜欢谈论这些事情。

3. When she saw the state of his clothes, she became more determined than ever to make him work hard during the holiday on Saturday.
    波莉姨妈心里正盘算着要罚他在星期六干活，现在，看到汤姆满身泥巴的样子，决心就更坚定了。

4. Water cannot sink through these hard surfaces.
    水无法渗透过这些坚硬的地面。

5. Working hard involves being organized, focused, getting a lot of work done, knowing when to stop, and having a life other than work.
    努力工作是指工作有条有理、精力集中，完成许多工作，知道何时歇手，知道除了工作还有生活。

6. When the researcher returns, he gives these children their hard-earned pieces of candy.
    研究人员回来之后，把这些孩子经过努力赢得的糖果给了他们。

7. This made the driver following her brake hard.
    这使得她后面的司机猛力刹了车，

8. This job entails a lot of hard work.
    这项工作需要十分努力.

9. The teacher exhorted him to work hard.
    教师谆谆告诫他要用功.

10. The seed has a hard exterior covering.
    这个种子的外壳很硬。