junior high school
US /ˌdʒuː.njɚ ˈhaɪ skuːl/
UK /ˌdʒuː.njɚ ˈhaɪ skuːl/

1.
初中, 初級中學
a school for children aged 11 to 14, typically comprising grades 7, 8, and 9, between elementary school and high school
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My daughter is starting junior high school next year.
我女兒明年要上初中了。
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He met his best friend in junior high school.
他在初中時遇到了他最好的朋友。