1. 交点：轨道的取向表示为轨道平面相对于参考平面[通常为黄道(ecliptic)]的倾角(inclination)以及升交点(node)经度(从春分点到升交点的角距离. 天体在其轨道上的位置则决定于其偏近点角(anomaly),此位置作为时间的函数是从近重心点行程的时间来计算的.

1. 节;结;瘤
    A node is a point, especially in the form of lump or swelling, where one thing joins another.

\u0039\u0031\u0031\u67E5\u8BE2\u00B7\u82F1\u8BED\u5355\u8BCD

    e.g. Cut them off cleanly through the stem just below the node.
           就从茎节下面，沿茎干把它们全砍掉。
    e.g. ...nerve nodes.
           神经结

1. (computer science) any computer that is hooked up to a computer network

    Synonym: clientguest

2. any bulge or swelling of an anatomical structure or part

3. the source of lymph and lymphocytes

    Synonym: lymph nodelymph gland

4. (astronomy) a point where an orbit crosses a plane

5. (physics) the point of minimum displacement in a periodic system

6. (botany) the small swelling that is the part of a plant stem from which one or more leaves emerge

    Synonym: leaf node

7. any thickened enlargement

    Synonym: knobthickening

8. a connecting point at which several lines come together