A caterpillar must pass through the cocoon stage to become a butterfly.
A caterpillar must pass through the cocoon stage to become a butterfly.
毛毛虫必须经过茧的阶段才能变成蝴蝶。
A caterpillar must pass through the cocoon stage to become a butterfly.
毛毛虫必须经过茧的阶段才能变成蝴蝶。