Several days ago, I was suddenly disturbed by a joyous din from outside the window. Looking out of it, I saw scores of boy and girl students in the middle of tidying up the open ground. The girls were in colourful down jackets or woolen sweaters, and the boys were in green army uniforms or dark-coloured jackets. They worked with hoes or shovels. Some were busy fencing off the land with iron-bar railings. Evidently, they were trying to turn the wide open ground in front of our building into a garden bright with lush green grass and blooming flowers.
2. The mother is undergoing the joyful pain, and the painful joy of childbirth. (英译汉)