| 1. | All necessary materials should be on hand .
一切必须的材料应准备就绪。 |
| 2. | I have not the gifts that are necessary for scholarship .
我没有做学问所必须的天资。 |
| 3. | More exchange between world leaders is needed .
世界各国领导人之间更多的交流是必须的。 |
| 4. | A give-and-take society should compromise here and there .
一个互相让步的社会遇事应达成必须的妥协。 |
| 5. | In the case of cotton processing, opening is necessary preliminary to cleaning .
在纺棉的情况下，开棉是除杂前必须的。 |
| 6. | It should be noted that a balance is not always required in a wind tunnel .
应该指出，天平对风洞来说并非是绝对必须的。 |
| 7. | Replication is necessary because site conditions are always somewhat variable .
重复是必须的，因为立地条件常常有些变化。 |
| 8. | The third parameter needed for an oil field to occur is the cap rock or seal .
形成油田所必须的第三个参数是盖层岩石或封闭层。 |
| 9. | The ability to produce is limited by the availability of the basic ingredients necessary for production .
生产的能力要受到生产所必须的基本构成要素供给的限制。 |
| 10. | Q represents the nonmetallic atoms necessary to complete a heterocyclic nucleus containing 5 atoms in the heterocyclic ring .
Q是形成5个原子杂环核所必须的非金属原子。 |
