Spdt
[电] 单极双投
🗣️ 情景例句
And have you had an engineer come in to do an inspection?
你们可有一个工程师来做过检查吗？
Peter began to hear about the interesting new play.
彼德开始听到新放映的电视剧很精彩。
She struck the keys too hard and two of the strings were broken.
她在击琴键时用力过猛，损坏了两根琴弦。