1906年顶部= Great Call& z7 T: J& B- S \) J3 S8 m
1908年低点= off by +6 months- [7 Q g/ z# @8 q) n+ X9 Q
1918年顶部= off by -6 months- _' d8 k6 H8 K4 |' V
Great Call,我觉得可以译成 完美符合/ o. x6 K3 C) [; h u$ e
off by +6 months,后偏6个月 2 \0 c' s. n% A( T, Y) N8 Qoff by -6 months,前偏6个月