Radiation 的音标是 /ˌreɪ.dɪˈeɪ.ʃən/。

含义：

辐射，特别是指电磁波、粒子或其他形式的能量通过空间或物质传播。

辐射能量，比如热量、光线等从一个物体传播到另一个物体。

发散，在某些语境下也可表示从中心向外的扩展或传播。

例句：

The doctor explained the effects of radiation on human health.

Nuclear plants produce large amounts of radiation.

Radiation from the sun can be harmful to your skin.

He was exposed to radiation during his work at the lab.

The building was designed to protect people from radiation.

Scientists are studying how radiation affects DNA.

The radiation emitted by the phone can cause damage to cells.

The satellite detects radiation from space.

We need to wear protective clothing to prevent radiation exposure.

The radiation levels are higher in areas near the nuclear reactor.

短语搭配：

Radiation therapy - 放射治疗

Ionizing radiation - 电离辐射

Radiation exposure - 辐射暴露

Radiation dose - 辐射剂量

Cosmic radiation - 宇宙辐射

Thermal radiation - 热辐射

Radiation protection - 辐射防护

Radiation sickness - 辐射病

Alpha radiation - 阿尔法辐射

Beta radiation - 贝塔辐射

这个词语在科学、医学、物理学等领域常用，尤其是在谈到辐射和能量传播时。