Constraints can be simple single values, or they can be a compound value or multiple types.

约束可以是简单的单值，也可以是复合值或多个类型。

youdao

Instead of checking for a default compound value, you can also catch the access to an undefined variable. E.g.

不用再检查默认的复合值，您也可以捕获对未定义变量的访问。

youdao

First from high prices dissuading new buyers (as seen in Western jewelry demand since 2005) but more significantly from state interference in a market averaging 36% compound growth by value each year since 2001.

FORBES: China's Gold Imports: Grain Of Salt, Please

Additionally, corporates in the area will also be affected negatively by the downgrades, this will tend to decrease value and compound price depression in the respective regions.

FORBES: Eurozone Crisis Solutions: Markets & Mechanisms

According to him, Dr Afridi did get suspicious by late April 2011 that there might be a high-value target in the Abbottabad compound, but he still didn't know who it was.

BBC: Was 'Bin Laden doctor' Shakil Afridi an unsuspecting pawn?