early 15c., from Old French dorsal (14c.) or directly from Medieval Latin dorsalis, corresponding to Latin dorsualis "of the back," from dorsum "back," which is of uncertain origin.
雙語例句
1. a shark's dorsal fin
鯊魚的背鰭
來自《權(quán)威詞典》
2. His dorsal fin was down and his huge pectorals were spread wide.
它的脊鰭朝下耷拉著,巨大的胸鰭大張著.
來自英漢文學 - 老人與海
3. There are usually no dorsal pores in the first few intersegmental grooves.
身體前幾個節(jié)間溝內(nèi)經(jīng)常無背孔.
來自辭典例句
4. The heart is dorsal and is provided with paired ostia.
心臟位于背方,有一對心門.
來自辭典例句
5. Only the dorsal lip of the blastopore could induce altered development in the host.