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 4000 Duolingo (R) - Spelling Practices
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n. 球拍 a device consisting of an oval frame with a tightly interlaced network of strings and a handle


Spelling Word: racket
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n. 雷達 measuring instrument to detect distant objects by microwave


Spelling Word: radar
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v. 批准,認可 approve formally; confirm; verify


Spelling Word: ratify
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v. 抵制,抵抗,遠離,節制 abstain from; resist; hold oneself back


Spelling Word: refrain
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n. 拒絕,不允 act of refusing; denial of anything demanded


Spelling Word: refusal
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n. 政體 form of government; government in power; administration; prevailing social system or pattern


Spelling Word: regime
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v. 登記 give outward signs of; express; record in writing; enroll as a student


Spelling Word: register
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v. 管制,控制 impose regulations; fix or adjust the time, amount, degree, or rate of


Spelling Word: regulate
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v. 複製 duplicate, copy, reproduce, or repeat; fold over or bend back


Spelling Word: replicate
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v. 繁殖,再生,複製 have offspring or young; duplicate; make a copy


Spelling Word: reproduce