助けてください

It was achieved at the cost of unending effort, but, with all the forces of gravity against it, a fleeting poise in mid-air, a lovely attitude worthy to be made immortal in a bas-relief, it was lost as soon as it was gained, and there remained no more than the memory of an exquisite emotion.
もうすぐ期末テストがあり，わからないため翻訳していただけるとありがたいです．