| 释义 |
射线shèxiàn
1.波长较短的电磁波,包括红外线、可见光、紫外线、X射线、丙种射线等。速度高、能量大的粒子流也叫射线,如甲种射线、乙种射线和阴极射线等。{ray; electromagnetic wave with a shorter wavelength, including infrared, visible light, ultraviolet ray, X-ray, gamma ray, etc. The particle beam with high velocity and energy stimulation is also called ray, such as alpha ray, beta ray, cathode ray, etc.}
2.数学上指从一个定点出发,沿着单一方向运动的点的轨迹;直线上某一点一旁的部分。{(math.) line that extends from a given point along a given direction; path or trace of a moving point along a given direction; part of a straight line next to a given point} |