preanal

常见例句

roundworm having a preanal sucker.
有一圆柱形吸管的蛔虫。
roundworm having a preanal sucker .
有一圆柱形吸管的蛔虫。
preanal fin Fin in front of the anus in larval fishes.
肛门前的鳍在仔鱼期时，肛门之前的鳍。
preanal length The straight distance from the upper jaw to the anus.
肛门前的长度从上颌到肛门的直线距离。
myomere formula Preanal plus postanal myomeres equals total myomeres in larval fishes.
肌分节的公式在仔鱼中，肛门前的加肛门后的肌分节数等于总肌分节数。
preanal membrane Medial membrane along the ventral surface of gut and anterior to anus.
肛门前的薄膜沿著消化道腹面到肛门前的中间薄膜。