圣诞花环大多用新鲜草木编结而成，用以装饰门庭。所用到的植物通常都是四季常青的……
The Christmas wreath has decorated many a door with fresh greenery. Wreaths are often made of evergreens, including holly, mistletoe, pine and fir.
Because they are green and bear fruit in the winter when other plants appear lifeless and bare, evergreens signify Gods immortality and everlasting life. The wreaths circular shape reminds us of the circles of life, family and love.
参考译文
圣诞花环大多用新鲜草木编结而成，用以装饰门庭。所用到的植物通常都是四季常青的，包括冬青、槲寄生、松树以及枞树枝。因为这些植物都是绿色的，而且在冬季结果，与其他这个季节毫无生命力的、光秃秃的植物不同，常青象征上帝的永恒与不朽的生命。花环的圆形也让我们记住生命的轮回、家庭以及爱。(竞学生活)