上课迟到的原因
The reasons for being late for class
以上为机器翻译结果，长、整句建议使用 人工翻译 。
那就是他为什么会上课迟到的原因。
That's why he is late for class.
youdao
他说了上课迟到的原因，没有人相信。
He gave a reason for his being late for school, which nobody believed.
他上课迟到的原因显而易见。
The reason why he was late for class is quite clear.
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