老大爷的英文：
uncle
grandpa

参考例句：

Vicious thugs attacked an elderly man.
歹徒们袭击了一个老大爷.

uncle是什么意思：
n. 伯父；姑父；舅父

Never say uncle
嘴硬,不肯服输、不肯承认

My uncle was the mayor of Memphis.
我伯父是孟菲斯市市长。

Is your abdicate good to the uncle?
你的让位对叔叔是好事吗？

He was named after his uncle.
他是依照叔父的名来命名的。

He was cradled in the house of his uncle.
他是在叔叔家中长大的。

grandpa是什么意思：
n. 爷爷，外公

Grandpa, get the net, please!
爷爷 ，请把网子拿来！

Grandpa was a real old soak.
爷爷真是个老酒鬼。

My grandpa is a fishing enthusiast.
我爷爷是个钓鱼爱好者。

I love you, Grandpa.
我爱你， 爷爷。

Grandpa and grandma sat in the back of the car.
爷爷和奶奶坐在汽车后排的座位上。