音标:[ɔpˈtɪʃənz] ;
n. 眼镜(制造)商, 配制眼镜技师( optician的复数形式 )
n. a worker who makes glasses for remedying defects of vision

When you think about inventions that have radically changed human existence, what comes to mind? Probably the wheel, the printing press, maybe the refrigerator and definitely personal computers. Then there are those more mundane things that we rarely

发表于:2019-01-22 / 阅读(107) / 评论(0) 分类 英语时差8,16
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