| 词汇 | of the essence |
| 释义 | of the essenceidiom (rather informal) essential必不可少；非常重要◆in this situation time is of the essence (= we must do things as quickly as possible).在这种情况下，时间是关键。◆speed is of the essence when transporting casualties to hospital.运送伤者去医院时，速度至关重要。 |
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