In fact, today I have worked on this document using three different operating systems and two different web browsers, all without any special software or complex logistics.
事实上，我今天用了三个不同的操作系统，两个不同的浏览器编辑这封邮件，一点问题没有。
In a complex logistics system design, these uncertainties should be taken into account.
在复杂的物流系统设计时，应该把这些不确定因素考虑进去。
In a complex logistics system design, these uncertainties should be taken into account.
在复杂的物流系统设计时，应该把这些不确定因素考虑进去。
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