我希望在不降低发动机的功率的情况下,减少燃油消耗,英语怎么说 (1) I hope to decrese the fuel oil consumption on the condition that the power of engine is not reduced (2) I hope to cut down the fuel oil consumption without failing to lessen the engine power (3) I hope to reduce the fuel oil consumption by means of not lowering the power of the engine (4) I don't hope to decrease the fuel oil consumption at the expense /cost of the reduction of the power of the engine. (5) I want to reduce the fuel oil consumption on the basis of not lowering the engine power (6) I would like to decrese the fuel oil consumption without lessening the engine power (7) I'd like to expect the reduction of the fuel oil consumption without accepting /expecting the reduction of the power of the engine