infra-roentgen rays

• [医] 跨界[射]线； 境界[射]线

infra-roentgen rays的用法和样例：

例句

1. 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。
2. The rays appeared to destroy the fast-growing cells of terrible growths in the body.
   辐射线似乎能破坏人体内迅速增长的恶性肿瘤细胞。