First they recorded the purrs of 10 cats; some were recorded when a cat was actively soliciting food and others in a non-solicitation setting.
首先他们录下了十只猫的呼噜声，其中有的是在猫要食物的时候记录的，其他的是在别的状态下记录的。
Gastric volumes were recorded in 31 anesthetized cats by balloons inserted into the stomachs through esophageal incisions.
用31只猫在麻醉后由颈部食道切口送入气囊至胃记录其容积变化。
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