He explained he was going to hospital for an X-ray.

他解释说他正准备到医院做x光检查。

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The ray optics and wave optics methods for slab waveguides are also explained while the Marcatili's method and the effective index method are introduced for channel waveguides.

研究了平面平板波导的射线理论分析法和电磁场分析法，条形波导的马卡梯里法和等效折射率法。

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But Sugar Ray came on and explained that he had read an article featuring my condition and was keen to speak with me.

BBC: Fighting with diabetes

Climate scientists point out that there is evidence to show that the sustained rise in global temperatures over the past 15 years cannot be explained by cosmic ray activity.

BBC: Cloud simulator tests climate models

"If the sudden frequency change is neglected, then after only eight hours, a complete rotation of the pulsar is lost in our counting, and we can no longer determine at which rotational phase the gamma-ray photons reach the detector aboard Fermi, " Pletsch explained.

MSN: Oddball pulsating star hiccups as it spins