| | racket:n.
 (球拍) device consisting of an oval frame with a tight interlaced network of strings and a handle; wooden paddle, as one used in table tennis
 | radiate:v. Syn. effuse
 (放射,輻射) spread out; effuse; issue or emerge in rays or waves
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| radical:a. Syn. drastic; extreme
 (根本的,激進的) drastic; extreme; arising from or going to a root or source; basic
 | radius:n.
 (半徑,半徑範圍) right line drawn or extending from the center of a circle to the periphery
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| raft:n.
 (筏,救生艇) a flat float made of logs or planks;  a large number or amount or extent
 | ragged:a. Syn. torn; worn
 (襤褸的,破爛的) torn; worn; having an irregular surface or edge; uneven or jagged in outline
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| rail:v. Syn. scold; rant
 (責罵,斥責,咆哮) scold; express objections or criticisms in bitter, harsh, or abusive language
 | ramble:v. Syn. wander
 (遊蕩,漫無目的遊蕩) wander aimlessly; move about aimlessly; walk about casually or for pleasure
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| rampant:a. Syn. wild; extravagant
 (猖獗的,滋生的,猛烈的) unrestrained and violent; occurring without restraint
 | ratio:n. Syn. rate; proportion
 (比,比率,比值) relation which one quantity or magnitude has to another of the same kind; rate; proportion
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| ravage:v.
 (毀壞,破壞,劫掠,災害) bring heavy destruction on; devastate
 | rave:v.
 (咆哮) speak wildly, irrationally; speak or write with wild enthusiasm
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| readily:ad. Syn. easily; quickly; promptly
 (容易地,欣然地,立刻地) easily; quickly; in a prompt, timely manner; promptly
 | reap:v. Syn. gain; harvest; glean
 (收割,收穫) gain; harvest a crop from; get or derive; obtain as a result of effort
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| reassure:v.
 (使安心,打消疑慮) give or restore confidence in; cause to feel sure or certain
 | recede:v.
 (後退,收回(諾言)) move back; retreat; withdraw a claim or pretension
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| recession:n. Syn. withdrawal; retreat
 (撤退) withdrawal; retreat; time of low economic activity
 | recipient:n. Syn. receiver
 (接受的東西,容納) receiver; one that receives or is receptive
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| reciprocal:a. Syn. mutual; exchangeable; interacting
 (互相的,互動的,互惠的) concerning each of two or more persons or things; exchangeable; interacting
 | recital:n.
 (朗誦,背誦,敘述) detailed account or description of something
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