NO.PZ2020021203000087
问题如下：
What is the difference between a straddle and a strangle?
解释：
A straddle is constructed from a call and a put with the same strike price and time to maturity. For a strangle, the strike price of the put is lower than the strike price of the call, but the times to maturity are still the same.
这个题是什么意思，请解释一下答案
