homotherm恒温: constant temperature海水: seawater; brine; the sea层: I storey; tier; stratum浅海水层: neritopelagic zone中深海水层: mesopelagic zone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:恒温海水层,即可在微信中查询翻译