The definition string contains the template definition (the static portion of the E-mail), which can make references to outside variables (the dynamic portion).
definition字符串包含模板定义(电子邮件的静态部分),它可以对外部变量(动态部分)进行引用。
So it's initialized outside the loop when it should be initialized inside the loop. Or conversely, inside the loop when it should be outside the loop. So look carefully at when variables are being initialized.
却忘记了,意思就是它本来应该,是在循环外初始化,但是却是在循环初始化的,所以在初始化变量的时候注意这一点。
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