In most cases, the single most important factor in desktop operating system performance is the amount of system memory available.

在大多数情况下，桌面操作系统性能的一个最重要因素就是系统可用的内存量。

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One factor contributing to the two-party system in the United States is the single-member district system of electing Representatives.

导致美国两党制的一个原因是，每个国会议员选区只能选出一名代表。

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Hence, such a system will mitigate the risk associated with the use of single-security mechanisms in both the factors in a two-factor authentication.

因此，这种系统降低了使用单一安全机制实现两因素身份验证的风险。

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As President Obama has said, strengthening our education system is probably the single biggest factor affecting the future success of our nation.

WHITEHOUSE: Education: Changing the Game