Dozens of small mining companies hope to open new mines in the United States and elsewhere that could tap reserves of medium and heavy rare earths.

美国能源部的报告还指出：几十家小公司都希望在美国或是其他地方新开发稀土矿，能利用导体和重稀土的储备。

youdao

And a cheeseburger, medium rare, with onion and French fries.

一份芝士汉堡五分熟，带葱头和炸薯条。

youdao

So that's one steak and chips medium rare, one chicken sandwich with salad, a cola and a sparkling water?

你们点的是一份三四分熟的牛排薯条，一份带沙拉的鸡肉三明治，一份可乐和一份苏打水，是吗？

youdao

In exchange for cash and an undisclosed number of shares of Rare Medium, which have since increased nearly sevenfold, Barlow had to give up 90% of his baby.

FORBES: Mad Hatchery Syndrome

So if kept very clean and very cold and handled with care, fresh tuna can be enjoyed medium rare, rare or even raw.

CNN: Tuna making a splash in popularity

Now, astronomers have scoured one of the few suspected hiding spots for medium-sized black holes in a globular cluster, and conclude they are rare or nonexistent.

MSN: Existence of middleweight black holes nearly ruled out