having a feeling or desire that is not returned in the same way by another person
单方面的, 无回报的
他的单相思让他心碎。
(of a position, argument, theory, etc.) not capable of being supported, defended, or justified when receiving criticism or objection
站不住脚的, 无法辩护的
事实揭露后，这位政治家的立场变得站不住脚。
never having existed or happened before
前所未有的, 空前的
新政府政策在医疗保健可及性方面带来了前所未有的变化。
a professional who measures and maps land boundaries, elevations, and features for construction or legal purposes
测量员
the act of monitoring a person or place, especially by the police
监视, 监控
安全摄像头的监控录像帮助解决了这个案子。
the part in harmonic music or the voice with the highest pitch that belongs to a boy or female vocalist
高音, 女高音
理发店四重唱中的高音为和声增添了明亮活泼的音调。
to keep existing, especially with limited food or money
生存, 维持生活
失业后，他学会了如何在非常紧张的预算下生存。
a situation in which one has just enough money or food to survive
生存, 生计
农村地区的许多人依靠捕鱼为生。
to prove something to be true by providing adequate evidence or facts
证实, 确认
他的研究发现证实了他提出的假设。
connected to the essence or reality of something
实质的, 本质的
to bring together again, especially after a period of separation
重聚, 团聚
家庭在假期团聚，一起庆祝和分享时光。
to find and collect data stored on a computer
检索, 提取
breaking down and rotting, typically referring to organic material
腐烂的, 腐臭的
由于食物在外面放了太久，它变得腐烂，不得不被扔掉。
in the process of decomposing, resulting in a foul odor and visible breakdown of organic material
腐烂的, 分解过程中的
古老的阁楼里堆满了腐烂的遗物，它们的表面已经变质并散发着恶臭。
