One of the most interesting experiments with dolphins must be one done by Doctor Jarvis Bastian.
出自-2012年6月聽力原文
Well, first of all, he kept the two dolphins together in the same tank and taught them to press levers whenever they saw a light
出自-2012年6月聽力原文
If the light flashed on and off several times, the dolphins were supposed to press the left-hand lever followed by the right-hand one.
出自-2012年6月聽力原文