These cells form a slick surface that helps the blood move without friction.

这些细胞形成光滑的表面，帮助血液无摩擦地流动。

A fault is a place with a long break in the rock that forms the surface of the earth.

断层指的是在形成地球表面的岩石上有一个很长的裂隙的地方。

Most plants will likely not survive if large amounts of salt collect on top of the soil and form a hard surface.

如果土壤表面积聚了大量的盐并形成坚硬的表面，大多数植物可能无法存活。

Instead of soft muddy sand, the sediment was held together so tightly by a mat of bacteria that it formed a hard surface.

沉积物不是柔软的泥沙，而是被一堆细菌紧密地结合在一起，形成了一个坚硬的表面。

Today, the typical feather consists of a central shaft, called a rachis, with serial paired barbs forming a flat, curved surface, which is called a vane.

今天，典型的羽毛包含一个中心轴（称为羽轴），还有连续成对的羽支形成平坦弯曲的表面，这被称为叶片。

The idea that space and time may form a closed surface without boundary also has profound implications for the role of God in the affairs of the universe.

空间和时间可以形成一个没有边界的封闭表面的想法也对上帝在宇宙事务中的作用具有深远的影响。

These and other features appear to be due to material from the interior of Europa welling up and forming the new surface, kind of like the way lava does on Earth.

这些以及其他特征看起来似乎是由木卫二内部物质涌出地表并形成的，就像地球上的熔岩。

It was at the conference in the Vatican mentioned earlier that I first put forward the suggestion that maybe time and space together formed a surface that was finite in size but did not have any boundary or edge.

正是在前面提到的梵蒂冈会议上，我首先提出，也许时间和空间共同构成了一个表面，这个表面的大小是有限的，但没有任何边界或边缘。