A medieval chemical philosophy having as its asserted aims the transmutation of base metals into gold, the discovery of the panacea, and the preparation of the elixir of longevity.炼金术，炼丹术中世纪的一种化学哲学。其声称的目标是将一些基本金属转变为金子，发现万灵药及制备长生不老药
His friends asserted that he was innocent.他的朋友们断言他是清白的。
She asserted her innocence/that she was innocent.她坚称自己很清白[她是无辜的]。
