例句與造句

1. They can exhibit reverse gradients, which result when pressurized meltwater flows over obstacles such as ridges or hills along the glacier bed.
2. And if it was moved sideways back into the reverse gradient when it reached the top, would it sink again, creating a mechanical over-unity device ? talk ) 12 : 37, 15 November 2009 ( UTC)
3. It's difficult to find reversed gradient in a sentence. 用reversed gradient造句挺難的