为了测明鱼辨别不同颜色的本领，一位科学家曾做过一万四千次试验。
One scientist has made more than fourteen thousand experiments testing the ability of fish to recognize different colours.
为了测明鱼辨别不同颜色的本领，一位科学家曾做过一万四千次试验。
One scientist has made more than fourteen thousand experiments testing the ability of fish to recognize different colours.
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