您要查找的是不是：
- radium beryllium source 镭 铍中子源
- The news comes from a reliable source. 这消息来自可靠的来源。
- Radium and uranium are radioactive elements. 镭和铀是放射性元素。
- Radium can be fixed some distance from its original source. 镭在离它的原始母体一定距离上固定下来。
- My wages are the principal source of my income. 薪金是我收入的主要来源。
- Solar energy is a new kind of source of energy. 太阳能是一种新型能源。
- He was the discoverer of the element radium. 他是镭元素的发现者。
- The sun is the ultimate source of energy. 太阳是能量的最基本来源。
- A source of irritation or annoyance. 令人生气的事或者引起烦恼之事
- The groundwork or source of something. 基础，根源某事物的基础工作或根源
- Where is the source of the Rhine? 莱茵河发源于何处？
- He's been a source of discord and worry. 他成为不和和烦恼的根源。
- A source of harassment, annoyance, or pain. 使人痛苦的东西骚扰，烦恼或痛苦的来源
- Radium is a radioactive element. 镭是个放射性元素。
- Is the water polluted at source or further downstream? 河水是在源头还是在流出之後受到污染的？
- We should stop using beryllium whenever possible. 我们只要可能，就应该停止用铍。
- At one end of the barrel there was some radium. 枪管的一端装有镭。
- Hard work is the ultimate source of success. 努力工作是成功之本。
- Who is the scientist that first discover Radium? 最先发现镭的科学家是谁?
- The proof came from a plenteous source. 证据来自丰富的渠道。
