trochoidal curve余: Nine minus four is five.; Fo ...余摆线波: trochoidal wave余摆线波形: trochoidal form余摆线的: trochoidal余摆线轨道: trochoidal orbit下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:余摆线,即可在微信中查询翻译