umbilici

核心释义

1. 1.

   肚脐。

   A navel.

2. 2.

   种脐。

   A hilum.

3. 3.

   许多螺旋形贝壳基部中央的凹陷或开口。

   A depression or opening in the center of the base of many spiral shells.

4. 4.

   羽毛羽轴上的两个孔之一。

   Either of the two apertures in the calamus of a feather.

5. 5.

   连接宇航员或航天器与母船的管道,用于传递补给和样本。

   A tube connecting an astronaut or spacecraft to the mothership, through which supplies and samples can be transferred.

6. 6.

   曲面上各法截线曲率均相等的点。

   A point of a surface at which the curvatures of the normal sections are all equal to each other.

种脐。；许多螺旋形贝壳基部中央的凹陷或开口。；羽毛羽轴上的两个孔之一。；连接宇航员或航天器与母船的管道,用于传递补给和样本。；曲面上各法截线曲率均相等的点。