double circulatory system圈: circle; ring系: system; series闭圈系: closed loop system; closed loosystem线圈系: coil array; coil system; sonde body打圈系紧: loop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:圈系，即可在微信中查询翻译
