I've seen those symptoms before.

以前见过类似状况

And of course I have to mention the elephant in the room...

当然我应该提一下房间里的大象

when sin(θ) can be approximated by θ,

sin(θ) 近似等于 θ

the time is the same.

所需的时间是相同的

arises from the repeated

一种无力感

in these first three little vignettes,

你们就能体会的到

That means the velocity is also oscillating sinusiodally,

这意味着速度也在以正弦方式振荡

So, if A is the range of variation for x,

如果 A 是 x 的变化范围

Because pressure is going up and down in the heart,

因为血压在心脏里时高时低

the aorta as well and we'll talk in a minute about why that happens.

了主动脉 我们马上要讲其发生的原因

with the Sherman Antitrust Act of 1890 and is--

随着谢尔曼反托拉斯法在各州出现

and in most other market economies,

连续震荡时期