single stage dialing一次: once一次拨号音: dodi:direct outward dialing one二次拨号: two-stage dialing二次拨号音: second dialing tone; secondary dial tone一次拨款法: lump sum appropriation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:一次拨号,即可在微信中查询翻译