Caches almost always take the form of object maps with an upper size limit.

缓存始终采用对象映射的形式，具有大小上限。

youdao

A cache should also maintain a reasonable upper size limit to avoid memory over-utilization in custom code.

缓存还应该维护一个合理的大小上限，以避免自定义代码中内存的过度使用。

youdao

The size of other columns in the same table can further reduce this upper limit.

同一个表中其他列的大小可以进一步减少这个上限。

youdao

The natural limits of the size of smartphones put a de facto upper limit on how heavy they can be.

ENGADGET: Switched On: The weighty issues of slates