通过加载Linux来替代(或补充)主机操作系统，可以使老式机器焕发新的活力。
You can give older machines a new life by loading Linux instead of (or in addition to) the host operating system.
凯斯勒补充说，相比于其它的自我恢复型材料，这种复合物也有两大缺点：要在受压情况下操作，过程要数小时。
Kessler adds, however, that the new material suffers from two of the main drawbacks faced by other self-healing materials: it requires pressure, and the repair process takes hours.
云计算将可移植设备与强大的服务器互为补充，它需要一个能够让服务器架构师和程序员最大程度利用小型客户机机器的操作系统。
Cloud computing, where portable devices complement powerful servers, requires an operating system that maximizes what the server architects and programmers can do on a small client machine.
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