longitudinal coordinate(s)

例句：

1. 1. The longitudinal axis of the molecule is perpendicular to its plane.
   分子的纵轴与其平面垂直。
2. 2. The longitudinal growth of the plant is influenced by the amount of sunlight it receives.
   植物的纵向生长受到阳光照射量的影响。
3. 3. The longitudinal section of the beam shows a uniform cross-sectional area.
   梁的纵向剖面显示了均匀的横截面面积。