for things that are not

不易限定的
standardized--that are difficult to define.

商品定价
So, we want rice futures and we want wheat futures

我们有大米期货小麦期货
because there are so many different kinds of rice

因为这些都属于稻米中
in different areas and different--

不同的品种以及不同的...
so, we want to have a standardized price.

因此我们需定一个标准价格
There were no financial futures until the 1970s

七十年代以前并无金融期货产品
and people felt back then that we don't need futures contracts

当时人们认为我们并不需要此类期货合约
because there's a standardization of shares.

因为金融期货的标物均为标准的股份
Every share in a given company is exactly identical.

同一公司的每一份股份是完全相同的
When you say, I'd like to buy a hundred shares of a company,

比如你说我要认购某公司100股股份
you're not going to ask the broker,

你不可能去问经纪人