radioactive ray meaning in English

放辐性射线
放射线
放射性射线

The infant has been exposed to radioactive rays
那个婴儿已经暴露于放射线中。
Radioactive ray is material thing
放射线是实际的物质。
Radiotherapy to tumors is a sort of local treatment similar to operation , which focuses the radioactive rays on the target to the greatest extent so as to destruct it , whereas surrounding regions are not to be injured
肿瘤的放射治疗与手术治疗一样，是一种局部治疗手段，其目的是将放射线最大限度地集中到靶区内，以便摧毁病变组织，并有效地保留周围正常的组织和器官。