The scientists said they tracked the frogs by their call, a series of "harsh rasping notes" that began at sundown.
科学家说日落时分，这种蛙会发出一种“刺耳的尖叫声”，他们顺着这种叫声找到了小蛙。
The scientists said they tracked the frogs by their call, a series of "harsh rasping notes" that began at sundown.
科学家说日落时分，这种蛙会发出一种“刺耳的尖叫声”，他们顺着这种叫声找到了小蛙。
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