1 So, it's two times 3.12 plus four times 1.31, 6 all divided by six.

就是2*3。12+4*1。,最后再除以。

麻省理工公开课 - 固态化学导论课程节选

When we say that 2 + 2 = 4 or 2 + 3 = 5, we're saying something about numbers that our mind is able to grasp.

当我们说2+2=4或2+3=5时,我们是在讨论心灵可以掌握的数字

耶鲁公开课 - 死亡课程节选

+3b I've said the product was is 2 plus 3 b.

我们已经说了答案是。

麻省理工公开课 - 计算机科学及编程导论课程节选

One minus one-half plus one-third, it is all there.

-1/2+1/3，这就是它。

麻省理工公开课 - 固态化学导论课程节选

if I say a particle's location is i times t^2 plus j times 9t^3, for every value of time, you can put the numbers in and you can find the velocity by just taking derivatives.

一个质点的位置,i ? t^2 + j ? 9t^3,在每一个时间点,你可以把数值代入,并通过求导得到速度

耶鲁公开课 - 基础物理课程节选

So this is 3, plus 2 times 3, plus 4 t minus 2.

也就是3+2*3+4t，好。

麻省理工公开课 - 计算机科学及编程导论课程节选

This is 3 plus 3 plus t of b minus 2. Right?

+3+t对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选