单词	cardioid
释义	car·di·oid I. \ˈkärdēˌȯid\ noun (-s) Etymology: cardi- + -oid : a heart-shaped closed curve traced by a point on the circumference of a circle as it rolls completely around an equal fixed circle and forms an epicycloid of one cusp and one loop, the polar equation with cusp as pole being r=a (1 - cos θ), where a is the diameter of either circle [cardioid: ABP fixed circle; PCD first position of rolling circle; P tracing point; PM diameter through P; P1, P2, P3, P4 various positions of P; P1M1, P2M2, P3M3, P4M4 various positions of PM] II. adjective : connected with or relating to a cardioid
随便看	firer fire raft fire-raising fire red fire red toner fire resistance fire-resistant fire-resisting fire-resistive fire-retardant fire retardant fire-retarded fireroom fire runner fires firesafe firesafety fire salamander fire sale fire sand fire saw fire scarlet fire screen fire service fireset

英语词典包含332784条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。