He was swung to and fro, to and fro.

来回摇摆着。

Think of some things that go to and fro.

想想那些来回往复的东西。

Now move the hand to and fro and around but not up and down.

然后把手前后左右以及旋转摆动，但不要上下摆动。

And at night the firefly flits to and fro, shining like a tiny star.

晚上的时候，萤火虫飞来飞去，就像一颗亮晶晶的小星星。

The branch swings to and fro in the air, but still the bird sings on.

树枝来回地在空中摇摆，但那只鸟依旧在唱。

He arose and walked to and fro, stopping convulsively and gazing on the terrific scene.

国王站起身来，不停地来回踱步，突然间抽搐着停了下来，凝视着这可怕的场景。

They went to and fro with bundles until they had a good pile on the dais.

他们来回搬运了一捆又一捆，在平台上堆起了好大一堆。

She zipped to and fro, grabbing objects. " ...follow you around, carry your things, watch you sleep? "

她来回走动着，抓起各种东西，“… … 跟你四处走、帮你拿东西、看你睡觉？”

The carriages began to sway to and fro, and I could hear exclamations of fright from the passengers.

这时，车厢开始前后摇摆，我甚至听到了旅客们恐惧的尖叫。

There, fishes had glided to and fro in the depths, and the water-weeds had grown along the shore.

那里曾经有在湖水深处来回游动的鱼儿和沿岸生长的水草。