noun 下载 🔗分享 凹面，凹陷。 A concave surface or curve. Examples : "The inside of the bowl is a concave shape. " 这个碗的内侧是一个凹面。 architecture math science 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 苍穹，天空. The vault of the sky. Examples : "The vast concave of the night sky was dotted with stars. " 浩瀚的夜空苍穹点缀着繁星。 astronomy space 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 天球，凹面. One of the celestial spheres of the Ptolemaic or geocentric model of the world. Examples : "Aristotle makes [Fire] to move to the concave of the Moon. - Thomas Salusbury (1661)." 亚里士多德认为，火会移动到月亮天球的凹面处。 astronomy world space theory mythology 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 凹面, 凹陷处 An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting. Examples : "The miner carefully adjusted the concave in the sifting machine to better separate the gold from the gravel. " 矿工小心地调整了筛选机里的凹面挡板，以便更好地将金子和砂砾分开。 agriculture machine part technical 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 凹槽, 内凹面 An indentation running along the base of a surfboard, intended to increase lift. Examples : "The concave on the bottom of the surfboard increases lift, making it easier to ride waves. " 冲浪板底部的凹槽可以增加升力，让冲浪更容易。 sport technical nautical 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 凹面，凹槽 An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength. Examples : "The concave on the skateboard allowed the skater to maintain a firm grip. " 滑板上的凹槽设计使滑板者能够保持稳固的抓板感。 sport technical structure vehicle device 与AI对话词汇游戏阅读练习
verb 下载 🔗分享 使凹陷，弄凹。 To render concave, or increase the degree of concavity. Examples : "The sculptor used a special tool to concave the inside of the bowl further, creating a deeper depression. " 雕塑家用特殊的工具使碗的内侧更加凹陷，做出了一个更深的凹陷。 appearance structure technical 与AI对话词汇游戏阅读练习
adjective 下载 🔗分享 凹的，内凹的 Curved like the inner surface of a sphere or bowl Examples : "The inside of the soup bowl was concave, making it perfect for scooping up the last bits of soup. " 这个汤碗的内侧是凹进去的，所以舀起最后一点汤来非常方便。 appearance 与AI对话词汇游戏阅读练习
adjective 下载 🔗分享 凹的，内凹的。 (of a polygon) not convex; having at least one internal angle greater than 180 degrees. Examples : "The shape of the garden plot was concave, with a large inward curve in one section. " 花园那块地的形状是凹的，有一部分向内弯曲得很厉害。 math technical structure science 与AI对话词汇游戏阅读练习
adjective 下载 🔗分享 凹的，内凹的 (of a real-valued function on the reals) satisfying the property that all segments connecting two points on the function's graph lie below the function. Examples : "The graph of the student's test scores showed a concave pattern; each segment connecting two test scores lay below the curve. " 学生的考试成绩图呈现出凹形的趋势；连接任意两个成绩点的线段都位于曲线的下方。 math function technical 与AI对话词汇游戏阅读练习
adjective 下载 🔗分享 凹的，中空的 Hollow; empty Examples : "The old, concave dish was almost empty after the family dinner. " 晚饭过后，那个旧的、凹下去的盘子几乎空了。 appearance architecture anatomy math science technical 与AI对话词汇游戏阅读练习
