A child's first word is one of the great milestones in life. For most children this happens when they are around 12 months old, give or take a few weeks in either direction. On average, a child has 10 words in his or her vocabulary by age 15 months and 50 words by age 18 or 19 months. And, yes, it's true that the first words learned by children the world over are usually the names for "mother" and "father." They get a lot of help with this, though.
[Translation from English to Japanese ] A child's first word is one of the great milestones in life. For most childre...
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最後の文、忘れてました。
多くの助けを経て、やっと子供たちはその言葉を言うのになるのです。