In the matching case, you can ensure that rules only run depending on the value of an environment variable.

在匹配情况下你可以确保规则仅仅依赖一个环境变量的值而运行。

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Drag and drop a variable of a type matching the interface onto the Invoke.

把一个类型与接口匹配的变量拖放到 Invoke 中。

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The Coynes' marriage has a whiff of a phantom variable that the matching algorithms don't seem to take into account: fate.

科因的婚姻有一点捉摸不定的变数，配对规则看起来也不能把它记录其中：命运。

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These hedges effectively convert these variable rate bank loans into fixed rate loans, better matching the interest expense from the loans to the income from the landfill gas projects they finance.

FORBES: Ameresco's Hedge Hurts Heads, Ho-Hum