六级Our tailoring department guarantees alterations to be completed within five working days.

我们的裁缝部保证在五个工作日内完成修改。

2017年12月六级真题（第一套）听力 Section A

四级Having made a choice within these limits we can have certain alterations made, but apart from minor adjustments, we tend to be limited to what the stores have on their racks.

在这些限制范围内做出选择后，我们可以进行某些更改，但除了小的调整外，我们往往只限于商店货架上的东西。

1997年1月大学英语四级(CET-4)真题

四级The researchers are already working with food companies keen to see if their products can be made resistant to bacterial attack through alterations to the food’s structure.

研究人员已经在与食品公司合作，希望通过改变食品结构，看看他们的产品是否能抵抗细菌攻击。

2000年1月大学英语四级(CET-4)真题

考研Also, the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere, possibly resulting in an alteration of the earth’s chief food-growing zones.

此外，大气温度的升高将导致北半球气候的巨大变化，可能导致地球主要粮食种植区的变化。

1992年全国硕士研究生入学统一考试英语试题