Or you can talk about the gate being open, and in this case, you can see that you will have an influx of ions.

或者你可以说闸门是打开的，就像这种情况，可以看到有离子通过它流入细胞。

麻省理工公开课 - 化学原理课程节选

It has a gate on it and that gate is in open or close state depending on whether a ligand is present or not.

在这个通道上有个门,这个门是打开还是关闭,取决于配体到来与否

耶鲁公开课 - 生物医学工程探索课程节选