The liquid is maintained above its melting point until steam is required at which point the liquid is allowed to turn back into a solid releasing its stored energy.
液体保持在其熔点以上，直到需要蒸汽时才可以变回固体，释放其储存的能量。
2
The liquid is maintained above its melting point until steam is required, at which point the liquid is allowed to turn back into a solid, releasing its stored energy.
不需要蒸汽时，液体保持在熔点以上，需要蒸汽时液体才能变成固体，释放其储存的能量。
3
This is the same arrangement found in an old-fashioned steam radiator, in which the coiled pipes pass heat back and forth as water courses through them.