once James Thornhill 中文意思

英语小短文翻译
Once James Thornhill, a famous English painter, was asked to paint some pictures on the walls of the king's palace in English.
Then workers were sent for and a big platform(平台) was made.
With the help of a worker, Thornhill started painting on the platform. They worked for a whole year and at last the pictures were ready.
Thornhill was happy when he looked at the pictures, for they were really beautiful. He looked at them for a long time, and then took one step back and looked again. Now the pictures were even more beautiful. He took another step, then another. Finally he was at the very edge(边缘) of the platform, but he did not know it because he was thinking of his pictures.
The worker saw everything. "What should I do?" he thought. "Thornhill is at the very edge of the platform. If I cry out, he will take another step, fall off it and surely be killed." So the worker quickly took some paint(颜料) and threw it at the picture.
"What are you doing?" cried the painter, running quickly forward to his pictures.