直到目前为止，修改对象属性时需要费一些特别的心思，例如使用左值子程序，你就可以直接操作子程序返回的标量。

Until now, special care had to be taken to allow modification of object attributes, for example. With lvalue subroutines, you can directly affect scalars returned by subroutines.

youdao

使用操作平台装置的直接费较钢管脚手架降低率为81.9%，并且随着建筑高度的增加，造价差异趋向扩大。

The direct fee caused by platform can be reduced 81.9% to that of steel scaffold. The difference will expands along with the increase of height of high-rise buildings.

youdao