Acknowledger
n. 认收开关；了望装置
🗣️ 情景例句
take a vacation away from the family--alone.
离开家人而单独在一起渡个假。
Most of them are less than 30.
他们中大多数不到30岁。
When he was alone, he telephoned the hospital exchange and asked for Doctor Millington.
当房里只剩他一个人时，他挂通了医院的交换台，要求与米灵顿医生讲话。