Callahan posits that chemical elements radiate electromagnetic signals.卡拉汉假定化学元素放射电磁信号。Callahan lnstitute is the leading brain - injury clinic in the Pacific Rim.卡拉汉医院在太平洋地区,脑部损伤治疗方面一直都是处于领先地位.In 1982 Steven Callahan was...
He was once an engraver in a printing factory.他以前是印刷厂的一名刻工.He was a sketcher and a copper - plate engraver .他也是杰出的素描家和 铜版画 家.William Hogarth, English painter and engraver, died in London and was buried in Chiswick church...