isochrone determination等: class; grade; rank时线: time line找寻: look for; seek等时线: hour-out line; isochronal line; isochrone; isotime; synchrone; time lines冰冻等时线: isopectic line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:等时线找寻，即可在微信中查询翻译
