adj.凹的n.凹面；凹線；凹形
用作形容詞 (adj.) The palm of one's hand is slightly concave.
人的手掌是微凹的。
A cylinder is a hollow tube with a closed concave base that permits it to stand upright.
鋼瓶是中空的管道，封閉的底部是凹入的，這樣可以直立起來(lái)。
His figure looks very funny in the concave mirror.
他的樣子在凹鏡里顯得非�？尚�。
用作名詞 (n.) These are aberration-corrected holographic concave gratings.
下表所列為像差校正全息凹面光柵。
The cloven hooves are sharp edged, elastic and concave.
蹄鋒利，呈凹形，富有彈性。
This article has described expanding method for repairing the concave retaining ring caused by the hydraulic bulging.
詳細(xì)介紹了用擴(kuò)沖法對(duì)液壓脹形出現(xiàn)凹形的護(hù)環(huán)進(jìn)行修復(fù)的方法。
本文來(lái)自：逍遙右腦記憶 http://yy-art.cn/danci/823219.html
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