这些是专门黏附在细胞膜蛋白质上的物质。

These are substances which specifically latch onto the protein on the cell membrane.

《柯林斯英汉双解大词典》

当一只昆虫与它们擦身而过时，就会触发一种微小的电荷，电荷沿着树叶里的隧道向下移动，并打开泪液细胞膜上的小孔。

When an insect brushes against them, this triggers a tiny electric charge, which travels down tunnels in the leaf and opens up pores in the tear's cell membranes.

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掌握细胞膜的流体镶嵌模型。

Master fluid mosaic model of the cell membrane.

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So, this is called the extracellular region or domain, this is the trans-membrane region or domain, and this is the cytoplasmic region or domain.

因此,这部分叫做胞外区,中间这部分叫做跨膜区,内部这一段叫做胞质区

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