但苦于寻找古代煤层的合适的类比物。
But it is difficult to find a modern suitable analogue of ancient coal.
该系统可能适合用作超导量子干涉装置（SQUID）的一个类比物，能够探测转动。
The system may be suitable for use as an analogue of the superconducting quantum interference device (SQUID), able to sense rotation.
这样，我们就又回到了西摩关于吸尘器的类比，20世纪50年代风格的圆筒真空吸尘器是最好的类比物了。
This gets back to Seymour's vacuum analogy. A 1950s-style cylinder vacuum provides the best comparison.
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