Fold a corner exactly to the middle point.

把一个角对准中心点折过去。

It usually falls on March 20th or 21st, marking the middle point of the spring season.

它通常落在3月20日或21日，标志着春季的中点。

The elections are called this because they happen nearly two years – or about the middle point – into the term of the U.S. president.

之所以叫“中期选举”是因为其在美国总统任期的近两年（即大约中间点的时候）举行。

By saying 2, then 3, he would force you to let him into one of the middle points of the grid, and then a 4 would break him free.

通过说 2，然后 3，他会强迫你让他进入网格的中间点之一， 然后 4 会让他自由。