Concave
['kɒnkeɪv] or [kɑn'kev]
解釋/意思:
(a.) Hollow and curved or rounded; vaulted; -- said of the interior of a curved surface or line, as of the curve of the of the inner surface of an eggshell, in opposition to convex; as, a concave mirror; the concave arch of the sky.
(a.) Hollow; void of contents.
(n.) A hollow; an arched vault; a cavity; a recess.
(n.) A curved sheath or breasting for a revolving cylinder or roll.
(v. t.) To make hollow or concave.
校對:朱莉娅
同義詞及近義詞：
a. Hollow, rounded.
校對:玛吉
同義詞及反義詞：
SYN:Hollow, scooped, pitted, excavated, retreating, alveolar
ANT:Convex, tumular, protuberant, relievant, embossed, intumescent
爱德温錄入
解釋/意思:
adj. curved vaulted or arched applied to the inner side of any curved line or rounded body and opposed to convex which is applied to the outside.—n. a hollow: an arch or vault.—adv. Con′cavely.—n. Concav′ity the quality of being concave: the inner surface of a concave or hollow body.—adjs. Concā′vo-con′cave or Doub′le-con′cave concave on both sides of a lens; Concā′vo-con′vex concave on one side and convex on the other.
整理:斯图
例句/造句/用法:
- K is the cathode plate, formed of a concave disk of aluminum, which focuses the rays at a point near the center of the bulb. Edward W. Byrn. 十九世紀發明進展.
- The other is a pad made of aluminum which is concave on one side and convex on the other and may be used in a wet pack. 佚名. 神奇的知識之書.
- This monster ship has been built on what is called the wave principle of ship-building, with long concave bows. 弗雷德里克·科利爾·貝克維爾. 偉大的事實.
- The stalagmites were all a little concave, and the cavities were filled with water. 尤利西斯·格蘭特. U．S．格蘭特的個人回憶錄.
- The last three types, called concave lenses, scatter parallel rays so that they do not come to a focus, but diverge widely after passage through the lens. 伯莎M.克拉克. 科學通論.
- Nearsightedness can be remedied by wearing concave glasses, since they separate the light and move the focus farther away. 伯莎M.克拉克. 科學通論.
- The defect is remedied by concave glasses. 伯莎M.克拉克. 科學通論.
- You will perceive, Watson, that the glasses are concave and of unusual strength. 亞瑟·柯南·道爾. 福爾摩斯歸來記.
- The object of using a concave mirror was to be able to concentrate a greater number of the rays of light than could be done by a lens, and thus to form a brighter image. 弗雷德里克·科利爾·貝克維爾. 偉大的事實.
- At the pit end, the chute is solidly constructed with a concave flanged surface placed on the top of the kick-back. 佚名. 神奇的知識之書.
- It cannot depend on one, for that must be either convex, or concave, or plain. 魯伯特·薩金特·荷蘭. 歷史性發明.
- T ry a concave glass with the sun's rays to see whether a diminution of heat results. 李貝. 西洋科學史.
- The last form neither augments nor diminishes visible objects; the concave diminishes them, the convex increases them, but both show them blurred and indistinct. 魯伯特·薩金特·荷蘭. 歷史性發明.
- Concave glasses, by separating the rays and making the focus more distant, overbalance a wide eyeball with its tendency to focus objects in front of the retina. 伯莎M.克拉克. 科學通論.
- The gutters are the concave boards that extend the complete length of the alley, from the foul line to the pit, on both sides of the bed. 佚名. 神奇的知識之書.
芭比整理