Concave

(adj.) curving inward .

卡洛斯录入

• 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. 十九世纪发明进展.
• 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. 神奇的知识之书.
• 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·科利尔·贝克维尔. 伟大的事实.
• The stalagmites were all a little concave, and the cavities were filled with water. 尤利西斯·格兰特. U．S．格兰特的个人回忆录.
• 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. 科学通论.
• 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. 科学通论.
• The defect is remedied by concave glasses. 伯莎M.克拉克. 科学通论.
• You will perceive, Watson, that the glasses are concave and of unusual strength. 阿瑟·柯南·道尔. 福尔摩斯归来记.
• 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·科利尔·贝克维尔. 伟大的事实.
• At the pit end, the chute is solidly constructed with a concave flanged surface placed on the top of the kick-back. 佚名. 神奇的知识之书.
• It cannot depend on one, for that must be either convex, or concave, or plain. 鲁伯特·萨金特·荷兰. 历史性发明.
• T ry a concave glass with the sun's rays to see whether a diminution of heat results. 李贝. 西洋科学史.
• The last form neither augments nor diminishes visible objects; the concave diminishes them, the convex increases them, but both show them blurred and indistinct. 鲁伯特·萨金特·荷兰. 历史性发明.
• 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. 科学通论.
• 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. 神奇的知识之书.

芭比整理