X-rays and other forms of radiation were known to kill cells and these were aimed at lymph glands near and distant, on sites of secondary cancer spread in bone and lung and brain.

X射线和其他的射线可以杀死细胞，这些射线以近端和远端的淋巴结为目标，瞄准在骨头里、肺里和脑里扩散的继发肿瘤（转移瘤）。

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The supernova explosions that create and spread heavy elements also unleash a torrent of high-energy radiation: gamma rays, X-rays, and ultraviolet light.

创造并散播重元素的超新星爆发同样释放出一股高能辐射的激流：伽玛射线，X射线，紫外线。

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Which flowers spread pollen by insects? Show with a X.

哪种植物利用昆虫传播花花粉? 画“X”。

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However, a routine X-ray last October showed that the tumour had spread to his lung.

BBC: The boy, 11, who battled cancer twice in one year