中英释义：
原声例句
当声源和观察者之间的距离发生变化时，波动的频率也会发生明显变化。
Yes. It's the apparent change in the frequency of a wave caused by relative motion between the source of the wave and the observer.
《生活大爆炸 第一季》《The Big Bang Theory Season 1》
双语例句
观察者示意司机停车。
The spotter signaled the driver to stop the car.
美是由观察者的眼睛决定的。
Beauty is in the eye of the beholder.
观察者注意到了环境的变化。
The observers noted the changes in the environment.
观察者记录了野生动物的行为。
The observers recorded the behavior of the animals in the wild.
观察者对团队的表现印象深刻。
The observer was impressed by the team's performance.
观察者对实验的精确度印象深刻。
The observers were impressed by the precision of the experiment.
观察者在整个事件中收集了数据。
The observers gathered data throughout the entire event.
观察者仔细记录了环境中的变化。
The observer noted the changes in the environment carefully.
观察者对野外动物的行为感到着迷。
The watcher was fascinated by the behavior of the animals in the wild.
古代遗迹的神秘吸引了每个观察者。
The mystery of the ancient ruins fascinated every beholder.