See Part 3 for an explanation of launch options.
关于启动选项的说明请参阅 第 3部分。
The use-when filtering occurs early in the setup of a transformation, specifically before any input document is loaded or any launch options are acted upon.
use-when筛选在转换建立的早期阶段进行，具体来说在加载输入文档或者启动选项生效之前进行。
The use-when filtering occurs early in the setup of a transformation, specifically before any input document is loaded or any launch options are acted upon.
use-when筛选在转换建立的早期阶段进行，具体来说在加载输入文档或者启动选项生效之前进行。
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