例句與造句

1. A fluid bulk density \ rho _ \ text { fluid } of 1 g / cm?is appropriate where the water is fresh but highly saline water has a slightly higher density and lower values should be used for hydrocarbon reservoirs, depending on the hydrocarbon density and residual saturation.
2. It's difficult to find residual saturation in a sentence. 用residual saturation造句挺難的