英语语法分析

This is a standard stackable letter tray.

这是一个标准的堆叠信件托盘。

For example, one product I worked on had a set of stackable views.

有个例子，我曾参与一个产品，它有一套堆栈视图。

This makes hives stackable and since the frames are of universal size, they can be

这样就可以把蜂房摞起来，因巢框是通用尺寸，故可在蜂房间交换，人们可事先准备好巢框。