open-system test开: open; turn on; switch on; be ...式: type; style试验: experiment; test; trial开式试验段: open test section开式试验法: open-system test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:开式试验，即可在微信中查询翻译
