背鰭引肌protractor: n. 1.半圓規(guī),分度規(guī),量角器。 2.【解剖學(xué)】牽引肌 ...muscle: n. = mussel. protractor muscle: 舉足肌; 牽引肌pedal protractor muscle: 伸足肌protractor lentis muscle: 晶狀體牽肌下載手機(jī)詞典可隨時隨地查詞查翻譯