These are hollow tubes that connect every corner of the brain.

这些是连接大脑各个角落的空心管。

And now because it's a hollow tube... we can stick the wire in.

现在因为它是一个空心管...我们可以将电线插入其中。

The cells pump these ions into a hollow tube that runs through the sweat gland.

细胞将这些离子泵入穿过汗腺的中空管中。

The village towers are considered as hollow tubes, with large holes to allow light and air through the entire construction.

村塔被认为是空心管，有大孔，让光线和空气穿过整个建筑。

Laennec spends the next three years developing and testing various materials and mechanisms before settling on a hollow wooden tube with detachable plug.

在接下来的三年里，Laennec 开发和测试了各种材料和机制，最后选定了带有可拆卸插头的中空木管。

They hope to reduce both the number of components needed in a construction job and their weight — by replacing solid supports with hollow tubes, for example.

他们希望减少建筑工程中所需零件的数量并减轻零件的重量——例如，用空心管替代实心支撑物。

Water comes up through the roots and stem and enters the leaf through a vascular bundle, which contains a hollow tube for water transport called the Xylem.

水从根部和茎部上来，通过维管束进入叶子，维管束包含一个空心管，用于运输水，称为木质部。

In the center of the structure will be a hollow tube, which will contain six small elevators, as well as a spiral staircase, connecting all of the different levels.

其结构的中心将是一个空心管，它将包含六个小电梯和一个螺旋楼梯，连接所有不同的楼层。

In the same way that Mr.Smith's employees use roads to get his products to and from stores, your body uses blood vessels, which are hollow tubes for carrying blood.

就像Mr。Smith的员工，通过道路，将产品运入商店和在商店间运输一样，身体也使用血管（空心管）输送血液。

Blood travels through blood vessels, which are hollow tubes to carry blood, and blood is propelled by your heart, which is a hollow organ that pumps blood through the blood vessels.

血液流经血管（输送血液的空心管），血液是由心脏（中空的器官）推动的，将血液泵入血管。

That a proper quantity of this powder rammed into a hollow tube of brass or iron, according to its bigness, would drive a ball of iron or lead, with such violence and speed, as nothing was able to sustain its force.

将适量的这种粉末按其大小撞入中空的黄铜或铁管中，将以如此猛烈的速度推动铁球或铅球，其力量无法承受。