日期:
来源:雅诚德英语网
On Earth, for example, platinum and its allied elements, though rare at the surface, are reckoned more common in the planet's metal-rich core.
例如在地球上,铂和铂系元素在地表上虽然罕见,但人们认为在富含金属的地核里却是较为常见的。
On Earth, for example, platinum and its allied elements, though rare at the surface, are reckoned more common in the planet's metal-rich core.
例如在地球上,铂和铂系元素在地表上虽然罕见,但人们认为在富含金属的地核里却是较为常见的。