The NADH molecules carry their electrons to the cell membrane(the FADH2 is already attached to it),and there they transfer them to a complex membrance-embedded protein called NADH dehydrogenase.

• NADH分子将电子带入细胞膜（FADH2分子已附在膜内），在那里，他们转变成一种名为NADH脱氢酶的复合植入膜蛋白。