Cluster sampling, in which random "clusters" of households are measured, is used in populations that are not in even or structured Settings but are spread unevenly over a large geographic area.

分组抽样，即测量随机的家庭“组”，一般用于不均匀地分散在较大面积地理区域的人群。

youdao

Food production has doubled in the past 35 years, and there is more food per person than ever before, even if it was unevenly distributed, he said.

他说，在过去35年中，粮食产量翻了一番，即使分配不均，人均粮食占有量也比以往任何时候都多。

youdao

It is much harder for a pilot to achieve a soft landing if the plane is unevenly loaded even more so when the main engine appears to be overheating.

ECONOMIST: A monetary tug-of-war

In a recession it can be difficult for employers to cut wages, and it seems obvious that this would be even more true when wages need to fall unevenly, e.g. not 5% for all workers, but 10% for some and 0% for others.

FORBES: Should Employers Be Allowed To Prevent Workers From Sharing Their Salary Information?