He told her, not a single day in his childhood, he had been happy.

他在告诉她，没有一个单一的一天在他的童年，他过的幸福。

youdao

Becoming more acutely aware of how precious all the time you have with your older family members is, and how not a single day with them is guaranteed.

越来越强烈意识到：和年长的亲人在一起的时光太宝贵，说不定哪一天他们就不在了。

youdao

From the day you arrive at my house, you need not spend a single penny.

从你到我家的那一天起，你就分文不需花了。

《柯林斯英汉双解大词典》

"Butterfly in the sky, " she begins, as though not a single day had passed in the last two and a half decades that she didn't wake up singing that line.

ENGADGET: Re-Reading Rainbow: an interview with LeVar Burton

Not a single day.

WHITEHOUSE: The White House

Despite fears that Las Vegas would suffer from an excess of new hotels, a torrent of visitors left not a single room empty for a single day at MGM Grand's namesake casino-hotel in the second quarter.

FORBES: Follow through