booster seat
noun [ C ] uk/ˈbuː.stə ˌsiːt/ us/ˈbuː.stɚ ˌsiːt/ (UK also booster cushion)
(通常用于汽车内的)幼儿增高座位
a seat for a young child, used in a car, at a table, etc. that raises him or her to a higher level
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