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来源:雅诚德英语网
First of all, he kept the two dolphins together in the same tank and taught them to press levers whenever they saw a light.
首先,他把两只海豚放在同一个水箱里,教它们无论什么时候看到光就按控制杆。
First of all, he kept the two dolphins together in the same tank and taught them to press levers whenever they saw a light.
首先,他把两只海豚放在同一个水箱里,教它们无论什么时候看到光就按控制杆。