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n.
(半径,半径范围) right line drawn or extending from the center of a circle to the periphery


Spelling Word: radius
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n.
(筏,救生艇) a flat float made of logs or planks; a large number or amount or extent


Spelling Word: raft
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n.
(朗诵,背诵,叙述) detailed account or description of something


Spelling Word: recital
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v.
(背诵,细述,列举) repeat, as something already prepared, written down, committed to memory; rehearse, as a lesson to an instructor


Spelling Word: recite
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v. Syn. enlist; enroll
(征兵,征募,补充) enlist; register formally as a participant; engage for military service


Spelling Word: recruit
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a.
(无情的,残酷的) unmoved by appeals for sympathy or forgiveness; insensible to distresses of others; unyielding


Spelling Word: relentless
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n. Syn. alteration; renewal
(修复,整修) improving by renewing and restoring; state of being restored to its former good condition; renewal


Spelling Word: renovation
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n.
(重复,循环) act of doing or performing again


Spelling Word: repetition
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n. Syn. receptacle
(水库,蓄水池) tank used for collecting and storing a liquid; holding pond; lake used to store water for community use


Spelling Word: reservoir
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n.
(听从,辞职) act of resigning or giving up, as a claim, possession, or office; surrender


Spelling Word: resignation