使用wordsmith中的ConcGram进行统计时，经过Build Step1和Build Step2，这两步都是计算什么的？为什么不能和并为一个步骤？
在ConcGram统计表中的频率前面怎么出现了(+1)之类的符号？例如
congram Freq Details
would undergo a (+1) 1 (undergo: would a)
was to undergo (+8) 6 (undergo: was to)
would undergo to (+5) 1 (undergo: would to)
(+1),(+8),(+5)是什么意思？为什么要放在频率1,6,1的前面？
谢谢
在ConcGram统计表中的频率前面怎么出现了(+1)之类的符号？例如
congram Freq Details
would undergo a (+1) 1 (undergo: would a)
was to undergo (+8) 6 (undergo: was to)
would undergo to (+5) 1 (undergo: would to)
(+1),(+8),(+5)是什么意思？为什么要放在频率1,6,1的前面？
谢谢