You know, I think there can be differences that are more pronounced with something like espresso, where small, small variances in particle size manifest in flow rate quite notably, but for brewed coffee, I think grinding from frozen is definitely okay.

你知道，我认为像浓缩咖啡这样的东西会有更明显的差异，颗粒大小上的微小变化会流量上表现得非常明显，但对于煮咖啡来说，我认为从冷冻中研磨绝对是可以的。

All right. How does the flow rate in a pipe depend on its diameter?

好吧。管直径如何决定流量？

If the flow rate is just right, it piles up on the white dwarf and then undergoes fusion in a single colossal flash, erupting in a huge explosive flare.

如果流速率合适，它会聚集白矮星上，然个巨大的闪光中发生聚变，以巨大的爆炸耀斑的形式爆发。

Today you learned how the urinary system regulates the production of urine, by maintaining a study glomerular flow rate.

今天你们学习了泌尿系统如何通维持肾小球流速来调节尿液的产生。

And then the smooth muscle in the walls of the glomeruli respond to this stretching stimulus by constricting — automatically reducing the amount of blood flow into the glomeruli and leaving the flow rate relatively unchanged.

然肾小球壁的平滑肌对这种拉伸刺激做出反应，收缩——少流入肾小球的血流量，保持流速相对不变。

Because if you kept the resistance the same you'd have to grind your 18 grams much much coarser to have a similar flow rate.

因为如果您保持相同的阻力，您必须将18克磨得更粗，才能获得相似的流速。

Don't be surprised if you switch to a precision basket and you see your flow rate suddenly increase.

如果您切换到精密萃取头并看到您的流速突然增加，请不要感到惊讶。

Now, I know there'll be some impact from there being a larger headspace in the 22-gram basket, but really we're looking at just overall flow rate, and I think it's a nice illustration of the difference you get in well-made baskets.

现，我知道22克的萃取机中有更大的顶部空间会产生些影响，但实际上我们只关注整体流速，我认为这很好地说明了你从萃取机得到的差异。

It's all too common with cheap machines to have a different appearing flow rate just because the baskets don't match and that is unacceptable and extremely annoying.

对于便宜的机器来说，仅仅因为萃取头不匹配而出现不同的流速是很常见的，这是不可接受的并且非常烦人。

How's that for a flow rate equivalency?

这流量相当如何？

Actually, that was my job, to walk around the refinery every hour with a clipboard and look at flow rates on machines, and tell the shift supervisor where the bottleneck was so he could go yell at somebody.

实际上，我的职责是每小时拿着夹板炼油厂巡视， 查看机器的流量，并告诉班组长瓶颈所， 以便他能去责备相关人员。

I have to be able to measure exactly the flow rate of air going in and out of your mouth, and I have to be able to measure very precisely the concentration of oxygen coming out.

我必须能够精确测量进出你口中的空气流速，并且必须能够非常精确地测量呼出氧气浓度。

We were able to do that because another cool feature for the boxes we built was that by turning this knob you can control the flow rate so over time they can pump out different amounts.

我们之所以能做到这点，是因为我们建造的盒子还有个很酷的功能：通转这个旋钮，你可以控制流速，因此随着时间的推移，它们能够以不同的量进行泵送。

It’s the same thing we said before: The mass flow rate is the same for every point in the pipe.

这和我们之前说的样：管道中每个点的质量流量都相同。

The urethra's diameter also affects flow rate.

尿道的直径也会影响流速。

Uh, remember that paper I had published last year on sediment flow rate?

记得我那篇沉积速率论文吗？

The flow rate of this material is very bad .

这个物料流率很差。

But this loss can be overcome if the flow rate in from the glacier aquifer is high enough.

但如果来冰川含水层的流速足够高，这种损失是可以克服的。

It's the same thing we said before: The mass flow rate is the same for every point in the pipe.

质量流量 它管中的任何点都保持不变。

At the same time, operators  elected to open the service spillway gates to double the flow rate and accelerate the lowering  of the reservoir.

与此同时，运营方决定开启泄洪道闸门，将流量提高倍，并加速降低水库水位。