By my reckoning we were seven or eight kilometres from Borj Mechaab.是什么意思？

By my reckoning we were seven or eight kilometres from Borj Mechaab.

据我估计我们离梅卡巴堡有七八公里远。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

my

adj. 我的(I的所有格形式)；int. 啊呀，天啊；

例句
Racial discrimination is abhorrent to my council and our staff...
我的顾问班子和全体工作人员都对种族歧视深恶痛绝。

reckoning

n. 计算，账目，船只位置的推算，（尤指体育运动）属于可能胜出者行列之内；v. <正>计算( reckon的现在分词)，猜想，考虑，<非正>思忖；

例句
Police officers on the case are reckoning to charge someone very shortly.
调查这个案子的警官正在考虑尽快起诉嫌疑人。

we

pron. 我们，咱们，笔者，本人，朕，人们；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

seven

num. 七，七个，第七；n. 七，七个；

例句
His wife was sentenced to seven years imprisonment for aiding and abetting him...
他的妻子作为他的从犯被判入狱7年。

or

conj. 或，或者，还是，不然，否则，左右；prep. <古、诗>在…之前，比…更早；n. [纹章]黑金色、黑色；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

eight

num. 八，八个，第八；n. 八，八人（或物）一组，八人划船队；adj. 八个的；

例句
One in eight women lives in an abusive relationship.
每八位女性中就有一位遭受伴侣的虐待。

kilometres

n. 千米，公里( kilometre的名词复数 )；

例句
The helicopter can zip along at about 150 kilometres an hour.
该直升机能以每小时150公里左右的速度疾进。

from

prep. （表示时间）从…，（表示原因）因为，（表示来源）来自…，（表示分离）与…分离[隔开]；

例句
...an abortive attempt to prevent the current President from taking office.
企图阻止现任总统连任的失败尝试