磨刀霍霍 [ módāohuòhuò ]: lit. to sharpen one's sword (idiom); fig. to prepare to attack; to be getting ready for battle
里希特霍芬 [ lǐxītèhuòfēn ]: Ferdinand von Richthofen (1833-1905), German geologist and explorer who published a major foundational study of the geology of China in 1887 and first introduced the term Silk Road 丝绸之路