| 1. | "vigorous state action" was necessary .
“强有力的国家行动”是必不可少的。 |
| 2. | Farming was indispensable to the state's well-being .
农业对于这个州的繁荣昌盛是必不可少的。 |
| 3. | The meeting opened with the regular weekly "stunts. "
会议开始，先是每周必不可少的“噱头。” |
| 4. | Yes , fruits and vegetables are indispensable to life .
是的，水果和蔬菜对生命来说是必不可少的。 |
| 5. | They are a necessary part of the diet of all higher animals .
它们是高等动物营养必不可少的部分。 |
| 6. | Those are standard rules devised to keep out criminals .
这些都是一些必不可少的规定，防止罪犯混进来。 |
| 7. | In any case, separation of the two viewpoints is mandatory .
无论如何，把这两种观点分开是必不可少的。 |
| 8. | Mathematics is an essential and beautiful part of physics .
数学是物理学中必不可少的而又优美的一部分。 |
| 9. | In fact the adjective is becoming a real necessity on occasion .
事实上，这个形容词有时确实是必不可少的。 |
| 10. | The most important requisite of a theory is that it be useful .
一种理论最重要的必不可少的性质，就是它的有用性。 |
