direct exchanges直接: direct; immediate交换: exchange; swap; interchange; ...业务: vocational work; professiona ...包交换业务: packet switching service; packet-based service交换业务: exchange service; reciprocal exchange of business; switched service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:直接交换业务，即可在微信中查询翻译
