point pair的用法和样例：
例句
- One could draw an extensive flowchart for every trade, but the key point is to observe several inviolate rules, mostly having to do with money management and multiple timeframes.
你可以针对每笔交易扩大流畅，但关键是不要违背原则，这些原则大都偶和资金管理，多重时间周期有关。 - Next, we use a magnetic current line source or electric dipole source in place of the plane wave to examine the coupling between the SPP and a point source.
接著我们把平面波改成用一个磁流线源或电偶极来等效一个发光波源，以模拟表面电浆波和波源之间的耦合现象。
