even number of points

例句：

1. 1. The even number of people in the room is seven.
   房间里人数为七。
2. 2. The even-numbered days are always easier to plan.
   偶数天总是更容易计划。
3. 3.The even-numbered numbers form a perfect square.
   偶数数字形成一个完美的平方数。