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汉语拼音：shè xiàn

1.波长较短的电磁波，包括红外线、可见光、紫外线、X射线、γ射线等。速度高、能量大的粒子流也叫射线，如α射线、β射线和阴极射线等。

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。

1. 波长较短的电磁波，包括红外线、可见光、紫外线、爱克斯射线、丙种射线等。速度高、能量大的粒子流亦称射线，如甲种射线、乙种射线和阴极射线等。

2. 数学上指从一个定点向单一方向引出的直线。

• It will only register on sophisticated X-ray equipment.

  只有精密的X射线仪器才能显示出来。

• Radiation has a strong effect on the heredity of fruit flies.

  射线对于果蝇的遗传产生强烈的作用.

• The surgeons irradiated the tumour.

  外科医生用X射线照射那个肿瘤.

• When a surface is perpendicular to the rays, their intensity is at its maximum.

  当表面与射线垂直时，射线的强度最大。

• Sunlight consists of different wavelengths of radiation.

  阳光由几种不同波长的射线组成。

• X-rays can penetrate many objects.

  X射线能够穿透很多物体。

• Some of the radiation was bent slightly toward the negative pole.

  一些射线稍稍弯向负极.

• In X - ray fluorescence, pieces of the filter are used directly.

  在 X 射线荧光法中, 可直接使用滤纸.

• A metal called uranium gave off a kind of radiation.

  一种叫铀的金属会发出一种射线.

• Strictly speaking, it is not possible to absorb gamma rays completely.

  严格来说, 不可能把γ射线全部吸收掉.

• These rays would not be visible to our eyes.

  人眼是看不见这些射线的.

• The effect of r rays was subtracted in all cases.

  在所有的情形下,都已扣除r射线的效应.

• X - rays are produced whenever electrons are brought to rest suddenly.

  突然使电子停止运动就会产生 X 射线.

• X - rays were produced when energetic electrons hit a solid object.

  X 射线是在高能电子击中固体靶时产生的.

• Two rags proceeding from the same point form an angle.

  从同一点出发的两条射线形成一只角.