早晚

They are designed to be connected directly to a supply, usually 9 - 12V, and no series resistor is required.

它们的目的是为了直接连接到电源，通常9 - 12V的，并没有串联电阻是必要的。

She's just gone off the boil ,as they say in the midwifery traded.

按产科学的说法，她第一次阵痛停止了。