In one case, executives discovered a coating advertised as pure gold that masked a complex alloy, which included rare metals such as osmium, iridium, ruthenium and rhodium.

在一个案例中，业内高管发现一种号称纯金的涂层其实是一种复杂的合金，含有锇、铱、钌、铑等稀有金属。

youdao

Actually, a very rare case, but one that'll help us just set up the formalism of, and the mechanism for us to proceed.

实际上这种例子很少，但是它可以帮助我们，建立一种框架或者机制，然后我们就可以利用，这些结果来继续我们的讨论。

youdao

In fact, Yang Chengxing's case is by no means a rare one.

事实上，毫无疑问，杨诚星的例子是很罕见的。

youdao

Terri Schiavo's case is a rare one, because though doctors say most of her brain is shut down, she can still breathe and move her eyes.

FORBES: For Dying, Geography Can Be Destiny

The attention deficit hyperactivity disorder drug, which is already on the market for sleepiness under the name Provigil, had caused one possible case of Stevens-Johnson Syndrome, a rare skin reaction.

FORBES: Blindsided

It might be a rare case, but we ought to remember, rather than that one witness that they found--and I guess they will find another one--but the Republican district attorneys who testified on the House side, the deputy attorney general in charge of the Criminal Division, William Weld, they said they would never bring the case.

CNN: Sen. Ernest Hollings' closed-door impeachment statement