单词	aridity
释义	aridarid /ˈærɪd/ ●○○ adjective Etymology ETYMOLOGYarid Origin: 1600-1700 French aride, from Latin aridus 1 earth science getting very little rain, and therefore very dry:  an arid climate2an arid discussion, period of time, etc. does not produce anything new—aridity /əˈrɪdət̮i/ adjective
随便看	rate -rate rate of change rate of exchange rate of reaction rate of return rat fink rather ratification ratify rating ratio ratiocination ration rational rationale rational equation rational expression rational function rationalism rationalist rationality rationalization rationalize rationally

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