Focuser
聚焦放大镜, 聚焦装置
🗣️ 情景例句
Jack, Would you please read this letter of application I've just written?
杰克，你能读一下这封我刚写的求职信吗？
He emerged as leader at the age of thirty.
他在30岁时出人头地成为领袖。
Sure I was. I'll never forget that.
我当然在那儿了。我永远都不会忘记那次地震。