gateway node的用法和樣例：
例句
- A network in which each node is directly connected by branches to all other nodes.
其中每個網點都通過分支與其它所有網點直接相連的一種網路。 - In a WAN, when the data bits arrive at the destination node, transmission stops right there.
在一個廣域網中，當數據位達到了目的網點時，傳輸也就正好停止到那裡。 - An activity can also be identified by its node numbers.
各項活動也都可以根據它的結點編號加以區別。 - The unknowns in the equations are the values of the dependent variables at the node.
方程中的未知數是結點上因變數的值。
