They opened their mouths, but the cheers would not come.
他们张开嘴,但却欢呼声没有传来。
Dogs not given a treat licked their mouths, yawned, scratched and showed other signs of stress and stopped performing the task, Range said.
没得到报酬的狗会舔自己的嘴,打哈欠,搔痒,它们还会表现出其他受到压力的特征,并且它们会停止表演,瑞治说。
They have ears, but they hear not; neither is there any breath in their mouths.
有耳却不能听,口中也没有气息。
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