chargen.责任；电荷；指控；费用；照顾vi.要价；充电；向前冲，冲锋；记在账上vt.控诉；赊帐；给…充电；委以重任；归罪于；装填（炸药等）charge rate充电速率

1. As the two charge distributions separate, leaving positive and negative sheaths.
   当两种电荷分布开始时，就留下正离子鞘和负离子鞘。