支干的英文

secondary stem

• 支:    branch; offshoot
• 干:    trunk; main part
• 支干线:    service main

例句与用法

1. Acropora solitaryensis : axial corallites are tubular and distinct . radial corallites are immersed on older parts of colonies , becoming tubular with nariform openings on peripheral parts
   轴向及径向的支干很难辨别,但都有锐利的边缘.片状周围的支干几乎是水平的,片上的支干短且直立生长. .片体下几乎没有支干生长