所有选项（包括 V8 选项）都允许单词用短划线（-）或下划线（_）分隔。 例如，--pending-deprecation 等效于 --pending_deprecation。

    If an option that takes a single value (such as --max-http-header-size) is passed more than once, then the last passed value is used. Options from the command line take precedence over options passed through the [NODE_OPTIONS][] environment variable.