在LHC可以启动前，必须将其5万吨设备用超流体液氦冷却至绝对零度之上仅1.8 K的温度，这是迄今为止历史上最大的低温工程。
Before the LHC can start, 50,000 tonnes of equipment have to be cooled to just 1.8? Kelvin above absolute zero with superfluid liquid helium - by far the largest cryogenic project in history.
超流氦的沸腾现象具有一般流体的沸腾现象所没有的特异性质。
The boiling phenomenon in the superfluid helium has some special characteristics.
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