null-speed motion零: zero zero sign; nought速: fast; rapid; quick; speedy运动: arrange things or get things ...非匀速运动,变速运动: non-uniform motion变加速运动: variable accelerated motion; varying accelerated motion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:零速运动,即可在微信中查询翻译