1. imagine vt.想像; 想，设想; 料想
例句：He could not imagine a more peaceful scene
他想象不出比这更祥和的景象。

2. discovery n. 发现，发觉
例句：I felt I'd made an incredible discovery.
我觉得我有一个天大的发现。

3. essential adj.必要的; 本质的; 基本的
例句：Protein is essential to life.
蛋白质是生命必不可少的。

4. scheduled adj.预定的; 排定的; 规定价格的
例句：The conference will be convened as scheduled.
会议将如期召开。

5. reveal vt.揭露; 泄露; 显露
例句：She has refused to reveal the whereabouts of her daughter
她不肯透露她女儿的行踪。

6. sustain vt.维持; 供养; 支撑
例句：A permanent state of cold war was impossible to sustain.
持续的冷战状态不可能继续维持下去。
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