Group (R) - Spelling Practices

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(1) n. (半径,半径范围) right line drawn or extending from the center of a circle to the periphery
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(2) n. (筏,救生艇) a flat float made of logs or planks; a large number or amount or extent 
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(3) n. (朗诵,背诵,叙述) detailed account or description of something
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(4) v. (背诵,细述,列举) repeat, as something already prepared, written down, committed to memory; rehearse, as a lesson to an instructor
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(5) v. Syn. enlist; enroll(征兵,征募,补充) enlist; register formally as a participant; engage for military service
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(6) a. (无情的,残酷的) unmoved by appeals for sympathy or forgiveness; insensible to distresses of others; unyielding
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(7) n. Syn. alteration; renewal(修复,整修) improving by renewing and restoring; state of being restored to its former good condition; renewal
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(8) n. (重复,循环) act of doing or performing again
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(9) 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
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(10) n. (听从,辞职) act of resigning or giving up, as a claim, possession, or office; surrender