Time will never go back.

时间永远不会倒退。

youdao

I give you my word and I'll never go back on it.

一言为定， 决不反悔。

《新英汉大辞典》

He said he could never go back.

他说自己无法回到坐式办公了。

youdao

Never go back. Find another. Leave at once. Go for a long trip again, but this time we'll go wherever I want, won't we?" I nodded. My Lolita.

绝不会去，另找一所学校，马上走，再去长途旅行，不过这次去我想去的地方，好吗？“我点头，我的洛丽塔。

耶鲁公开课 - 1945年后的美国小说课程节选

Now, if that potential changed and it stayed changed forever, then the cell would never go back to its resting state.

如果电势变化并且不再恢复到原始电势,细胞就永远不会回到静息状态

耶鲁公开课 - 生物医学工程探索课程节选

And as with the Moon, we may never go back to the places Jobs took us.

FORBES: We Are All Macs Now

Try a food coloring from a cooking store once, and you'll never go back.

NPR: Pursuit of the Perfect Christmas Cookie

My friends and I exchange funny stories in Gmail threads, then never go back and read them.

FORBES: Former Hulu CTO Eric Feng Debuts Living Calendar Erly.com