Therefore, highwayimprovement is also a key factor in preventing accidents.
因此，高速公路的改进也是避免交通事故发生的关键因素。
2
Before the design and construction of a new highway or highwayimprovement can be undertaken, there must be general planning and consideration of financing.
在着手做一条新建公路或改建公路的设计和施工之前，必须做总体规划和资金考虑。
3
The hybrid Chevrolet Silverado delivers up to 12 percent fuel economy improvement over comparable pickups, giving it the best highway fuel economy of any full-size truck on the market.