Rear and bottom input port connections and flush or extended mounting brackets allow the user to configure the manifold to maximize the use of available space.

后部和底部输入端口连接，冲洗或延长安装支架允许用户配置多方面最大限度地利用可用空间。

youdao

The tray at the bottom of the manifold can prevent glass chamber fraying.

底部特配有托盘保护玻璃真空气室，防止其磨损。

youdao

All too often pundits and policymakers seek a single cause for social stratification when they should accept that in a nation where inequality in real monetary terms is increasing - and has been doing so for quite some time despite the so-called boom years - the reasons for being at the bottom of the heap are manifold.

BBC: A Point of View: Race, class and house parties