What this magical number represents - 7 plus or minus 2 - is the number of items we can hold in our short-term memory.

这个神奇数字(7正负偏差2)代表着我们的短期记忆能记多少。

youdao

ProLogis has bested the others in the appreciation of its properties' worth, called net asset value, and in growth of earnings, whose REIT version is known as adjusted funds from operations (AFFO): net income plus depreciation, minus one-time items and maintenance outlays (see table).

FORBES: A Warehouse of Value