An ion channel is a molecule that allows the passage of electrically charged atoms of sodium, potassium, calcium and so on through the outer membrane of a cell.
离子通道是一种分子，它允许钠、钾、钙等离子经由它通过细胞外膜。
2
Rescue workers in 8 to start late, as the miners mining rescue channel and escape passage.
救援人员于8月底开始，为矿工挖掘救援通道和逃生通道。
3
The water area outside of North Passage is part of the submerged delta in Changjiang estuary, and there is the outlet of the outer navigation channel in North Passage.