小儿原因

Pediatric cause

以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译

1
他的小儿子曾拒绝与其他孩子玩，因为他们有属于自己的自行车，而他没有。由于这个原因，亚历山大发明了一种无可超越的自行车模型。
When his small son refused to play with other kids because all of them had bicycles of their own and he didn't, Alexander invented a model no one else could boast of.
2
小儿疾病的发病原因。
Pedistric disease's aetiological agent.
3
这也为什么在挑战愈发严酷、捐助疲劳症方兴未艾的关键时期，我们必须通过根除小儿麻痹症来结束这一切的原因所在。
That is why, despite the daunting challenges and potential donor fatigue, the world may end up making a go of eradication this time.

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