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- 一只名叫欢欢的大象还通过了所谓的标记测试，它反复地触碰它身体上的一个白色X标记，这个标记只能从镜子中看到。One elephant named Happy also passed the so-called mark test, repeatedly touching her trunk to a white X painted on her forehead that was only visible in the mirror.
- 对肺部作X射线摄影to sciagraph the lung
- 妇产科X射线检查X-ray examination in gynecology and obstetrics
- X射线CTX-my CT
- X射线光子X-ray photon
- X射线光学X-ray optics
- X射线造影X-ray angiography
- x射线衍射显微术x ray diffraction microscopy
- X射线天文学X-ray astronomy
- X射线毛细管X-ray capillary
- 数字X射线机digiter X-ray machine
- X射线探测器X ray detector
- 软X射线能谱Soft X-ray spectrum
- 硬X射线成像hard x-ray imaging
- 连续硬X射线continuous hard X-ray
- EUV软X射线EUV Soft X-rays
- 软X射线阴极soft X-ray cathode
- 单色化X射线Monochromatic X-ray
- X射线层析成象法X-ray tomography
- 空间X射线星图x-ray sky
