Onhis fourth day in the laboratory, the author of «In the

Onhis fourth day in the laboratory, the author of «In the Laboratory" was asked by the Professor to point out________ .
【正确答案】：the similarities and differences between the two fish
【题目解析】：原句的意思是“《In the Laboratory》的作者在到达实验室的第四天，教授要求他指出这两种鱼的相同和相异之处”。