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1·She rocked the baby to and fro.

她来回摇动着婴儿。《牛津词典》

2·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》

3·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。

4·I paced the floor to and fro with heavy strides as if I was excited to fury by the observations of the men—but the noise steadily increased.

我迈着沉重的脚步地来回走着，仿佛我对这些人的调查感到很愤怒——但这种声音越来越响。

5·The ray quivered to and fro, making her figure dim or distinct- now like a real child, now like a child's spirit- as the splendor went and came again.

那束光来回抖动，使得她的身影忽明忽暗——一会儿像个活生生的孩子，一会儿又像是孩子的精灵——随着光忽明忽暗。

6·What those early craftsmen had found by trial and error was that under pressure a pagoda's loose stack of floors could be made to slither to and fro independent of one another.

那些早期的工匠通过反复试验发现：在压力作用下，宝塔松散堆叠的楼层可以彼此独立地来回滑动。

7·The ship was rolling heavily to and fro.

轮船剧烈地颠簸着。《牛津词典》

8·She stood up and began to pace to and fro.

她站起来开始来回地踱步。《柯林斯英汉双解大词典》

9·Heidi in her transport was running to and fro: Grandfather, come out!

海蒂在路上里跑来跑去，喊着：“爷爷，快出来！”

10·The streets were filled with people running to and fro about their tasks.

街上满是为了工作跑来跑去的人。