"受到妈妈的肯定" 可以用英文表示为 "receive approval/praise from one's mother".

这个短语的来源是英语中 "approval" 和 "praise" 这两个词，分别表示 "认可、赞同" 和 "赞扬、表扬" 的意思。

下面是一些英文例句，并附上翻译：

I feel so proud to receive approval from my mother for my grades. (我为我的成绩得到妈妈的认可而感到非常自豪。)
It's always nice to receive praise from your mother. (总是能收到妈妈的表扬是件好事。)
I'm grateful to have received approval from my mother for my career choices. (我很感激能得到妈妈对我的职业选择的认可。)
I was so happy to receive praise from my mother for my cooking skills. (我很高兴能得到妈妈对我的烹饪技巧的赞扬。)