#妈妈随机组句#
空了两天，因为亲子阅读的固定时间是睡前，可是妹妹不睡觉，我们就没办法进行，奶奶来了，又可以了。
The birds have no teeth, how do birds eat?
Because birds have Gizzard, which can grind the seeds.

随机组句: the gizzard can grind seeds/nuts/wheats/corns..... ​