价差的英文：
variance in price

参考例句：

On option market the gain of butterfly spread investor is random.
期权市场蝶状价差的投资者获益具有随机性。

On option market the gain of butterfly spread investor is random.
期权市场蝶状价差的投资者获益具有随机性。

The spread is always darkest before the dawn.
黎明之前的价差总是最黑暗的。

Market makers earn their livings from the spread between buying and selling prices.
做市商靠赚取买卖价差生存。

"In terms of spread trading, we are having one of our busiest periods," said a crude trader with a European refiner
"就价差交易而言,我们正处于最忙碌的时期之一,"一家欧洲炼油厂的原油交易员表示.(完)

variance是什么意思：
n. 变化；不一致；分歧

Some variance of temperature is to be expected.
预料气温会有些变化。

It is unnatural for sisters to be at variance.
姐妹之间不和是不近人情的。

It's just a variance in your life.
它仅仅是生活中的一个变化。

Overhead variances may be usefully considered as variable overhead variances and fixed overhead variances.
我们可以把管理费用分为可变费用和固定费用两种。

My opinion is at variance with what the government is doing.
我的意见有别于政府目前所做的。

price是什么意思：
n. 价格，价值；代价
v. 给…定价；问…的价格

Prices are advancing.
各种物价都在上涨。

The price is outrageous.
价钱高得吓人。

Prices are on the rise.
价格在上涨。

Price has sagged.
价格已下降。

The price was duplicated.
价格加了倍。