It's a mutual gift, Martha, you know that.

这是我们共同的礼物，玛莎，你知道的。

United States and Japan have become close allies since World War II and decades before the war, the friendship between the Japanese and the American people was demonstrated in mutual gifts of trees.

二战以及战前几十年，美国和日本成为了关系较好的盟友，日美两国人民的友谊体现在相互赠送树木上。