这之所以成为可能，只是因为磁盘驱动器虽然价值高，但体积小、重量轻，因此运输成本低。
This is possible only because disk drives, while valuable, are small and light and so cost little to ship.
由于立方体卫星体积小、重量轻，将它们送入地球轨道的成本比传统通信或GPS卫星要低得多。
Because they're so small and light, it costs much less to get a CubeSat into Earth's orbit than a traditional communications or GPS satellite.
尽管这款机型性能较低，但由于体积小重量轻，因此可以直接安装在显示器后面。
In return for low performance, it can be mounted on the back of a display.
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