1906年顶部= Great Call( V6 [4 e R- n/ l9 l
1908年低点= off by +6 months8 ~- A& u- M; R- _( z# e
1918年顶部= off by -6 months! E: \7 s/ Q5 N* |" t" q) S; D
Great Call,我觉得可以译成 完美符合6 M1 ^% j5 v: w- g4 w; i, y
off by +6 months,后偏6个月 ; R4 X8 b7 I* X, l, c& H5 w b( @# eoff by -6 months,前偏6个月