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| indispensable; fundamental; absolutely essential (Юрий Гомон); of the essence (Юрий Гомон); vital | |||
| unexpendable (bigmaxus) | |||
| sine qua non | |||
| mandatory | |||
| absolutely indispensable; absolute indispensable | |||
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| this is a necessity; this is a must; it is imperative that | |||
| absolutely imperative (It was absolutely imperative that operations be suspended at this terminal. ART Vancouver); absolutely necessary (it is absolutely necessary for all employees to follow these safety rules and safe work procedures. ART Vancouver) | |||
| it's imperative (Yeldar Azanbayev) | |||
| совершенно необходимый: 19 短语, 6 学科 |
| 一般 | 12 |
| 俚语 | 1 |
| 刑法 | 1 |
| 数学 | 2 |
| 科学的 | 1 |
| 马卡罗夫 | 2 |