the recent studies in our group on the properties of nuclei at extreme conditions, i . e . nuclei at high densities and high temperatures, their possible liquid-gas phase transitions and the multifragmentation are reviewed 摘要对近年来本小组所研究的极端条件下原子核,即高温高密原子核性质及其可能出现的液汽相变和多重碎裂等进行了综述。