n.(外)祖母( grandmother的名词复数 );
例句:
Their mothers and grandmothers were perhaps a little more deliberate.
她们的母亲和老祖母也许是过分拘谨了点儿.
My grandmothers are both widows.
我奶奶和外婆都是孤寡一人。
And the woodwork was of the era of our grandmothers.
还有我们祖母时代的板壁.