| 释义 | 
             
                concave area
                
            凹āo 
 concave; hollow; sunken; dent; sink; low-lying area翘弯qiào wān 
 crosswise concaving凹面āo miàn 
 camber concave; concave surface [camber]; concavity; rearward face革命老区gé mìng lǎo qū 
 old revolutionary base areas疫区yì qū 
 affected area; epidemic area; infected area截面面积jié miàn miàn jī 
 sectional area; cross-sectional area专区zhuān qū 
 a special administrative area贫困地区pín kùn dì qū 
 depressed area党区dǎng qū 
 paging area工区gōng qū 
 work area禁地jìn dì 
 forbidden area渔区yú qū 
 fishing area硬通货地区yìng tōng huò dì qū 
 hard currency area凹面镜āo miàn jìng 
 concave mirror凹透镜āo tòu jìng 
 concave lens比表面积bǐ biǎo miàn jī 
 specific surface area; specific area粮食主产区liáng shí zhǔ chǎn qū 
 major grain producing areas占地面积zhàn dì miàn jī 
 floor area; floor space罚球区fá qiú qū 
 penalty area帆面积fān miàn jī 
 sail area居民区jū mín qū 
 residential area军区jun1 qū 
 a military area勘探区kān tàn qū 
 exploration area牧区mù qū 
 a pasturing area萧条区xiāo tiáo qū 
 depressed area
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