Impurity semiconductor
[电] 杂质半导体
🧩 词语组成解析
🗣️ 情景例句
Don't be lazy, the older you get, the harder it will be to learn.
别偷懒，年纪越大，学起来就越难。
He is playing on the merry-go-round in the park.
他正在公园里骑旋木马。
Yes, he did.He telephoned at nine o'clock.
是的，打了。他在9点钟又打电话。