X-rays

/ˈeks reɪz/ 14
X-rays are a form of electromagnetic radiation, similar to visible light.

noun [专属名词]伦琴线; X 射线

X-rays can penetrate many objects.X射线能穿透很多物体。

X-rays 出现在下面的课文中
Episode 24 Parting Friends ACT I
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