Something simple isn't multi layered, it only has one fold.

简单的东西不是多层，它只是一层。

youdao

While riding in an elevator you must talk to no one fold your hands and look toward the door.

步入电梯，你不能和人说话，必须交叠双手、直视门口。（原来那么多人都违法了）

youdao

And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd.

我另外有羊，不是这个圈里的。我必须领他们来，他们也要听我的声音。

youdao

And again,it is two-fold: one is,we want to help our colleagues in Mexico, but it does have an impact on safety and security in the United States."

VOA: standard.2009.03.24

One of the initial things that Keyes found is that there was as much as a ten-fold difference in rates of coronary disease.

凯斯首先发现的其中一项结果是,七个国家的冠心病发病率

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

One fold appears to be improving while the other hasn't, he said.

WSJ: Google CEO Larry Page Diagnosed With 'Vocal Cord Paralysis'

He injected four shots of lidocaine into one nasolabial fold, and another four on the opposite side.

FORBES: Going Under The Needle

The harpsichord, a table-size Renaissance favorite, was cleverly reengineered as a boxlike model called a virginal (in tribute to Queen Elizabeth I) that one person could fold up and carry.

FORBES: TRACKING THE EVOLUTION OF TAKE-OUT TUNES