| 11. | It is indispensable in the home. |
| 它是家庭所必不可少的。
|
| 12. | It is universally acknowledged that trees are indispensable to us. |
| 全世界都知道树木对我们是不可或缺的。
|
| 13. | It is widely acknowledged that computer and other machines have become an indispensable part of our society, which make our life and work more comfortable and less laborious. |
| 人们普遍认为计算机和其他机器已经成为我们社会必不可少的一部分。 它们使我们的生活更舒适，减少了大量劳动。
|
| 14. | Air is indispensable to life. |
| 空气是生命所必需的东西。
|
| 15. | an indispensable addition to every library |
| 每个图书馆都不 可缺少的新书
|
| 16. | indispensable requisites |
| 不可或缺的必需品
|
| 17. | an indispensable guide |
| 必备的指南
|
| 18. | an indispensable complement to |
| 对…的必不可少的补足物
|
| 19. | an indispensable companion to students |
| 学生必备的参考书
|
| 20. | indispensable qualifications |
| 必不可少的先决条件
|