Now only about "There is change in some people traditionally expected platinum to be an expensive metal, people are looking at it in the same terms as gold values,"

VOA: standard.2009.10.17

If he switched from gold to let's say iron, he also tried platinum, a number of different foils, he found that they count rate it still was 20 alpha particles per minute.

金箔的时候，计数率就变成零了,如果他把金换成比如说铁，他们还尝试了铂,还有一系列其他的箔片，他发现计数率还是每分钟。

麻省理工公开课 - 化学原理课程节选

So platina is like a diminutive of silver, but we now know that platinum is far superior to silver It is far more noble. It has a higher melting point, a higher chemical inertness, a fantastic metal.

所以普拉塔就像一个小小的银，但我们现在知道普拉塔比银要好很多,更为珍贵，熔点更高，化学惰性更高，是一种非常不可思议的金属。

麻省理工公开课 - 固态化学导论课程节选

Customers are looking at other precious metals, like platinum.

VOA: standard.2009.10.17

Platinum was unknown until the Spanish came to South America.

铂被人所知,是直到西班牙进入南美洲之后。

麻省理工公开课 - 固态化学导论课程节选

I'd prefer to make it out of platinum if I had my way.

我更愿意用铂来做，如果可以的话。

麻省理工公开课 - 固态化学导论课程节选

Platinum is an American metal.

铂是美洲的金属。

麻省理工公开课 - 固态化学导论课程节选