And then you minus the average of e, the quantity squared.
然后你减去e的平均值，这个量再平方。
2
Quantity: Quantity, unless otherwise arranged, shall be subject to a variation of 5% plus or minus at Sellers' option.
数量：除非另作安排，数量可能由卖方选择作加或减5%的变动。
3
And we can go through and calculate the value of this quantity in parenthesis. And, when we do so, we get the value 2.18 times 10 to the minus 18 joules.