Young mice in danger can make ultrasonic sounds that the human ear cannot detect. The mother mouse can hear these sounds from a distance. Then she hurries back to protect her babies.
处于危险情况下的小老鼠能发出人类听不到的超声波，母老鼠在远处也能听到这些声音，然后它就赶快跑回来保护自己的孩子。
Young mice in danger can make ultrasonic sounds that the human ear cannot detect. The mother mouse can hear these sounds from a distance. Then she hurries back to protect her babies.
处于危险情况下的小老鼠能发出人类听不到的超声波，母老鼠在远处也能听到这些声音，然后它就赶快跑回来保护自己的孩子。
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