Yet scientists were puzzled at what the food source would be for these critters.

然而，科学家们十分困惑，这些生物的食物来源又是什么呢。

youdao

Yet scientists were puzzled at what the food source would be for these critters.

然而，科学家们十分困惑，这些生物的食物来源又是什么呢。

youdao