photoelectric cathode
基本释义
光电阴极
实用场景例句
日常对话
His plaintive voice revealed his sadness.
他哀伤的声音暴露了他的悲伤。
校园生活
The plaintive notes of the violin filled the quiet room.
小提琴哀伤的音符充满了安静房间。
留学生活
Her plaintive letters showed her longing for home.
她哀伤的信件显示了思念家乡之情。
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