Replaceability
更換性, 可代換性, 替換性
??? 情景例句
How's Donald?
Donald怎么樣？
If you can find another pair of tickets we'll have enough for a dozen people.
如果你能再找到兩張，我們就可以有十二個(gè)人去了。
Once in a while sailors came down, Kunta thought, to carry sick men upstairs for treatment.
偶爾水手下來(lái)，孔塔猜想是把生病的人抬上去進(jìn)行治療。