For -opt, the value of arg is used as the replacement value only if a value has been defined for all of the listed variables.
对于- opt，只有为列出的所有变量定义一个值时，才能将arg的值用作替换值。
Opt — indicating that the value of arg is to be used as the token's replacement value only if a value for any of the named variables has been defined.
opt——指示只有当为任何指定变量定义了一个值时，才将arg的值用作标记的替换值。
For example, given the token {-join|&|a,b=bar}, and a value of foo associated with the variable a, the replacement value for the token is a=foo&b=bar.
例如，给定标记 {-join|&|a,b=bar}和与变量 a关联的一个foo值，则标记的替换值为 a=foo&b=bar。
The insurance amount shall be equivalent to the replacement value of the Total Works plus materials, goods and work provided by the Client.
保险金额必须相当于所有工作的重置价值加上由客户提供的材料、货品和工程。
The insurance amount shall be equivalent to the replacement value of the Total Works plus materials, goods and work provided by the Client.
保险金额必须相当于所有工作的重置价值加上由客户提供的材料、货品和工程。
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