Complementarities
(complementarity 的復數) n. 互補性, 互為補充\\n[經] 互補性
??? 情景例句
Oh, let's see. It'll be about 3:30 before we have anybody free.
哦，讓我想想。大概要到3：30我們才有空。
A mean boy teases the dog.
一個淘氣的男孩在捉弄著狗。
One man was told to fix up an air-line to provide compressed air for the machines they were using.
有個工人被派去安裝"供氣管"，給他們正在使用的機器提供壓縮空氣。