阅读理解(Reading Comprehension) If you were to dive deep into the ocean, you would notice the colors act strangely as you move deeper into the water． At first before you've gone very far down, the colors will seem normal．But as you dive deeper, you begin to wonder where all the warm colors have gone．You try to catch sight of reds or yellows or oranges． Then as you sink still farther, you will see only blues and purples．Soon these, too, begin to lose colors as you go down． Now, far below the surface of the water, you will find yourself in a grey(灰色)，colorless place．The water above you is filtering out all of the sunlight's rainbow(彩虹)of light． If you continue to go down, you will soon be far below the surface that no light can reach you．The blackness will become so complete that your eyes will ache to see nothing．Now you are ready to return to the surface, with its changing colors． | 
