1、这是由于地球是圆的* ^, {' c+ _4 |5 y+ X' i8 H
this is as earth is circle.& } W8 F3 y% _& O
2、两个数以何种顺序相加是无所谓的
$ V& I" I2 z" R4 w4 R0 ]! a* Zit does not matter that which order 2 number add each other.2 L }" Y2 G8 Y; L; O
3、这与我们所观察的到接近
& Y$ g) E: c1 U1 u# P3 m7 _3 kit's near to what we observered." d# r% Q$ i0 v3 t( k1 }$ L
4、实际的方向与我们想象中的相反
+ |- Y- z! S, x, w: E$ athe real direction is reverse to what we imagined.
( q; o" r& a# E# s0 {/ F5、两国对边界线存在长期(long-standing)的分歧 1 K; m" x; O8 i9 _
2 countries have long-standing diversity to the border line. |