periodic current周期: period; cycle; circle; revol ...水流: rivers; streams; waters curr ...长周期水底多次波: long-period water bottom multiples周期性水流: periodical drainage周期性不稳定水流: periodic unsteady flow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:周期水流,即可在微信中查询翻译