目前为止，地质学家也不能理解黄金是怎么来的，他们表示以前从来没发现过类似现象。

Up till now, geologists can not explain where the gold comes from. They indicate that they have never observed the phenomenon like this before.

youdao

目前为止，地质学家也不能理解黄金是怎么来的，他们表示以前从来没发现过类似现象。

Up till now, geologists can not explain where the gold comes from. They indicate that they have never observed the phenomenon like this before.

youdao