A heavy silvery toxic univalent and bivalent metallic element ; the only metal that is liquid at ordinary temperatures .

银色有毒金属 元素，重， 单价或二价，唯一一种在常温下呈液态的金属。

A soft silver-white univalent element of the alkali metal group ; the lightest metal known ; occurs in several minerals .

一种银白色软质 单价 元素，碱金属属，已知最轻的金属，存在于许多矿物中。