Spdt
[电] 单极双投
🗣️ 情景例句
Can I count on you to help me?
我能仰仗你的协助吗？
The moon is a moon whether it shines or not.
或名或暗，月亮总是月亮。
and should not be put in drinks unless it is known to be safe.
只有知道冰块安全时才能加入饮料。