Compared to its adult size, a new-born kangaroo is minuscule.与成年袋鼠相比，刚出生的袋鼠小得可怜。A new-born baby will gain weight at around one ounce per day.新生儿的体重每天增加约一盎司。A new-born baby was found abandoned on the steps of a hospital yesterday.昨天，有人发现一个新生儿被人遗弃在医院的台阶上。