I didn't get enough sleep last night, because I had to take care of my two little sisters.

没什么，只是觉得你的妹妹很可爱，感觉她们长大一定很漂亮。

我制作了一个儿童机器人，由我亲手设计。我会让机器人照顾两个妹妹，因为她们还没长大。