宝宝要按时吃饭英语可以说成:"The baby needs to eat on time."

这句话的来源是出自日常生活中的一个常见场景,即宝宝需要按照规定的时间进食。

其他一些相关的英文例句及其中文翻译如下:

It's important for the baby to eat regularly. (对于宝宝来说,按时进食很重要。)
The baby needs to eat every three hours. (宝宝每三小时就需要进食。)
Make sure the baby eats enough. (确保宝宝吃够了。)
The baby should eat a balanced diet. (宝宝应该吃一种均衡的饮食。)