a riding crop的相关资料：
Aoyama a Aquamarine on Yellow Muscovite specimen a contentious issue/topic/subject a smug glow of self-congratulation. a semblable hit-and-run accident. a good/strict/poor disciplinarian A trademark used for methamphetamine. a natural consequence of development. A permanent diplomatic office abroad. A primitive hand-turned grain mill. a fixture providing artificial light.