conservative system守恒: conservation; conserve系统: system保守: guard; keep; hold on非守恒系统: non conservative system; non-conservative system守恒系统: conservation system; conservative system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:守恒系统;保守系统,即可在微信中查询翻译