external down time外部: outside; external故障: hitch; breakdown; stoppage; ...停机: halt; closing down; machine ...时间: time; hour故障停机时间: breakdown time; down time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:外部故障停机时间，即可在微信中查询翻译
