beta rays

同根派生

英汉例句

• Candidates may not retake a beta exam at any time.
  在任何时间都可以重考在线的无监考的考试。
• The corona's rays flash out in a brilliant fan that has wispy spike-like rays near the Sun's north and south poles.
  光环带的光束像一把流光折扇，在太阳的南北两极附近形成纤细的辐射线。
• The gun can fire invisible rays.
  这枪能发出看不见的射线。
• Cathode rays are attracted by a positive charge.
  阴极射线被阳电荷所吸引。