由于市场形势千变万化，出口产品必须不断地更新换代，胜人一筹。

With the market changing so quickly, our export commodities must be constantly upgraded to have a competitive edge over those of our rivals.

该种高炉风口将成为炼铁行业高炉风口更新换代的新设备。

This air vent will become a renewed facility of iron smelting industry.

该仪表作为国内工程机械行业更新换代的先导产品，具有广泛的应用前景。

As one of the leading products in construction machinery industry, this instrument is with the potential of wide applications.

文章摘要：针对目前宽甸县玉米品种更新换代慢、粮食产量不高的问题，引进4个玉米密植新品种。

Abstr: in order to solve the problems of slow upgrading speed and low yield of maize in Kuandian, it introduced 4 maize new varieties of compact planting.

他说：“事实的真相，是一场全面的更新换代正在进行，只说广东话的在新一代人中是极少数。”

“The fact of the matter is that you have a whole generation switch, with very few people speaking only Cantonese, ” he said.