在系统被创建的年代——即使不是几十年以前——这些应用程序时常由掌握较老的3gl和4gl语言的IT人员开发。
Created years — if not decades ago — these applications were oftentimes customized by an IT staff trained in older 3gl and 4gl languages.
有由触笔操控的银幕键盘,需要很高的技巧去掌握。
It has a stylus-operated on-screen keyboard that takes great skill to master.
执行权由董事长掌握。
How can we prevent murderous schoolyard violence in children who have access to weapons,poor parental supervision, and a mean streak?"
如何防止校园暴力,这些暴力事件通常是由掌握武器,缺乏父母监管,或受到教唆的孩子引起的“
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