During this period, we have worked on improving the raw material utilization and decreasing the cost of operation, which lead to some reductions of our products cost.
在此期间，我们一直致力于提高原料利用率和降低经营成本，从而导致一些我们的产品成本减少。
Ross says, "Any fuel that is not lead-based will come with changes to the overall operation and cost of an aircraft."
罗斯说：“非铅基燃油将改变飞机的运营与成本，我们希望在新燃油规范上获得重要地位。”
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