举足肌牵引肌protractor: n. 1.半圆规,分度规,量角器。 2.【解剖学】牵引肌 ...muscle: n. = mussel. pedal protractor muscle: 伸足肌protractor dorsalis muscle: 背鳍引肌protractor lentis muscle: 晶状体牵肌下载手机词典可随时随地查词查翻译