zyh79

白勇的解释：
在不清楚单，复数的情况下，优先使用复数。

zyh79

当初老白怎么说的，记不完全了。
如果按他的意思，是不是说：  
  there is one pc for 2 students，four times as many as there were 2pc for 16
与there is one pc for 2 students，four times as many as there was  1pc for 8
均为可接受表达。