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我养了一大一小两只乌龟,它们一起住在一个大玻璃鱼缸里。大一点的那只身体几乎被壳儿盖住了,总是在鱼缸里爬来爬去,却不会游泳;而小一点的
I have two freshmen and two tortoises, living together in a large glass aquarium. The bigger one is covered almost by the shell and always climbs in the aquarium but does not swim;