Boys prefer cars, trucks, balls and guns.
男孩喜好轿车、卡车、球和枪。
Male monkeys spent more time with the trucks and balls. Females played for longer with the dolls.
雄猴在卡车和球上花了很多时间，而雌性则用更多时间玩布娃娃。
Male monkeys spent more time with the trucks and balls. Females played for longer with the dolls.
雄猴在卡车和球上花了很多时间，而雌性则用更多时间玩布娃娃。
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