A manometer is just a U-shaped tube with a fluid inside.

计是一个形 母 U 充满体。

Which is where manometers and barometers come in.

这就是计的用武之地。 气计是气计。

Once the needle is inserted into the spinal canal, it's attached to a manometer, which is a device that measures the CSF pressure.

刺入腰椎管的针与流体计相连，来测量脑脊。

Then, we covered how manometers and barometers measure pressure.

然后我们讲了计的作用机理 气计是表。

The noise was even louder though than this may seem at first, because a pressure gauge located 161 kilometers away measured a sound of 180 decibels.

可是这噪音比初看起来还要强，因为在距火山161公里处的一个计测量到的声音是180分贝。