In these days the pre-industrial city in America functioned as a complex and varied organizing element in American life, not as a simple, homogeneous, and static unit.

在这些日子里，美国未工业化的城市在美国人的生活中是一个复杂而多样的组织元素，而不是一个简单的、同质的、静态的单位。

youdao

You want to add a validator to an existing model element (the core unit type), but the source code is not accessible.

您想要向已存在的模型元素添加一个确认器(核心单元类型)，但是不能访问源代码。

youdao

The element is carbon. That is the smallest unit.

那个元素是碳，是最小的单位。

youdao

Just as with Apollo, any modern venture would need some kind of CSM element for the astronauts, together with a departure stage - a propulsion unit that could accelerate the astronauts' vehicle out of low-Earth orbit, putting it on a path to the Moon.

BBC: Manned flight around Moon considered