back and forth

基本解釋

The pendulum swings back and forth.
這就像單擺一樣來回擺動。
Switching between these states allows Grier to move objects back and forth.
格里爾通過轉(zhuǎn)換這些狀態(tài)來實現(xiàn)向前和向后移動物體。
None of this means that what is popular is stagnant, but even dramatic shifts in opinion and political leanings follow a typical pendular pattern, reactively swinging back and forth.
這一切都不意味著流行的就是停滯不前的，然而意見和政策傾斜顯著地介入將引發(fā)著一個典型的擺動模式，即來回的擺動。

The road moves back and forth and around corners as it moves up the face of the mountain.
These two oscillate back and forth so the moment of deprivation is often then balanced by a moment of imagination.
來回交替喪失的時刻,經(jīng)常和想像的時刻,互相平衡。
耶魯公開課 - 1945年后的美國小說課程節(jié)選
Because there are ions moving back and forth, there's a current that flows and there's a electrical potential that's generated.
由于離子的進(jìn)進(jìn)出出,就產(chǎn)生了電流流動,并且形成了電勢差
耶魯公開課 - 生物醫(yī)學(xué)工程探索課程節(jié)選

And people were just making a lot of money, trading it back and forth, in and out.
NPR: Wall Street Too Real? Try Fantasy Investing