| 单词 | 永远保持 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔awake〕The perpetual need is to stay awake as long as we confront a powerful adversary.只要我们面临一个强大的敌手,就必须永远保持警惕。英汉大词典〔hypolimnion〕The layer of water in a thermally stratified lake that lies below the thermocline, is noncirculating, and remains perpetually cold.湖下层，湖底静水层：位于温跃层以下的有层温的湖的一层水，这一层水不循环，永远保持寒冷美国传统The firm has been growing rapidly, but you can't keep that kind of momentum up forever.这个公司发展很快，但是你无法永远保持这种势头。剑桥国际 |
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