一个4岁的孩子可能会抗议说，姐姐或妹妹喝的果汁更多。但其实果汁的量一样，只是杯子的形状不同。
A 4-year-old may protest that a sister has more fruit juice when it is only the shape of the glasses that differ, not the amount of juice.
研究者还意识到，有轻度症状的姐姐或妹妹，很少有被确诊的。
The researchers also noticed many female siblings had subtle traits, but few had full-blown autism spectrum disorders.
我妹妹（或姐姐）已订婚两个月了。
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