a latchkey child 鍵っ子
鍵っ子って英語で・・・・
a lathkey child (kid) と言います。
Latchkey kids come home after school and take care of themselves.
Many of them have single-parent or two-career families.
single-parent 片親 お父さんかお母さんかのどちらかしかいない。
two-career families 両親が共働きの家族
