fro
adv. 来回地，往复地
prep. 从，来自
n. 非洲式发型，爆炸式发型（Afro 的简称）
例句
She rocked the baby to and fro.
她来回摇动着婴儿。
《牛津词典》
After some to-ing and fro-ing, Elsie and the children moved back to Louisiana.
几番往复后，艾尔西和孩子们搬回了路易斯安那。
《柯林斯英汉双解大词典》
Here the wind was roaring through the branches and the tree-tops were swaying to and fro.
风呼啸着吹过树枝，树冠来回摇摆。
