efficient
(of a system or machine) achieving maximum productivity without wasting much time, effort, or money
高效的
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登录electronic
(of a device) having very small parts such as chips and obtaining power from electricity
电子的
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登录upset
feeling unhappy, worried, or disappointed, often because something unpleasant happened
烦恼的
[形容词]
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登录genetic
connected to the parts of the DNA in cells, called genes, that determine hereditary traits
基因的
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