only Grandchild
唯一的孙子
only ['əunli]
adv.只,仅仅；不料
adj.唯一的,仅有的；最合适的
conj.但是；不过；可是
例句
1.他唯一的孙子,跑过来迎接他.
his only Grandchild,ran to greet him.