| 1. | Keep the kettle at the boil .
使水壶里的水保持沸腾。 |
| 2. | Washing beforehand helps to keep the water in bath tub clean
因为这样能使浴池里的水保持乾净。 |
| 3. | Soil quality - determination of the water - retention characteristic - laboratory methods
土壤质量.水保持特性的测定.实验室法 |
| 4. | Yes , they can keep oil and water apart and keep the discharged water clean
是的。它们可以使油水分开，从而使排放的水保持清洁。 |
| 5. | For one thing they keep the water clean . also they make the tank look much prettier
一则它们（水下植物）可以使水保持清洁，再则他们可以便水箱看起来漂亮些。 |
| 6. | We need water to keep the existence of the animal plant , need water to carry on the varying of season and color
我们需要水保持动物植物的生存，需要水进行季节与色彩的变换。 |
| 7. | Soil quality - determination of unsaturated hydraulic conductivity and water retention characteristic - wind ' s evaporation method
土质.非饱和水渗导性和水保持特性的测定.风蒸发法 |
| 8. | Soil quality - determination of unsaturated hydraulic conductivity and water - retention characteristic - wind ' s evaporation method
土质.非饱和水渗导性和水保持特性的测定.风的蒸发法 |
| 9. | China ' s glaciers feed the yangtze and yellow rivers , which irrigate crops along their banks . melting glaciers will ultimately threaten food production
中国的冰川融水保持了长江和黄河的水量，沿岸用来灌溉。冰川融化最后将威胁农作物生长。 |
| 10. | Pour boiled water 3 - 4 inches deep into steamer and cover . keep the water boiling gently over a low heat . if necessary , add water to maintain steam
往蒸锅里倒开水，注满到距锅底3 ~ 4英寸高的位置即可，然后盖上盖。用文火将水保持在慢热沸腾的状态。如果需要的话，可以加一些水，以保持蒸汽不断。 |
