By my count that's five cakes you've had already.是什么意思？

By my count that's five cakes you've had already.

我数着你已经吃了五块蛋糕。

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。

count

n. 总数，数数，罪状，论点；v. 数数，计算总数，把…算入，重要；

例句
Election boards will count the ballots by hand...
选举委员会将人工计票。

five

num. 五，五个，与某人击掌问候（或庆祝胜利），第五；n. 五，五个，5美元钞票，[板]得五分；adj. 五的，五个的；

例句
I'm just checking up on Kim. It'll take me all of five minutes.
我只是要督促一下金，总共也就需要5分钟。

cakes

n. 蛋糕( cake的名词复数 )，糕饼，饼状食物，块状物；

例句
We'd been making cakes and colouring the posters...
我们一直在做蛋糕，给海报上色。

ve

abbr. Venezuela 委内瑞拉；

例句
Conclusion The TCD abnormity of VE occurs mainly in intracervical artery system.
结论病毒性脑炎脑血流动力学异常改变以颈内动脉系统为主.

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

already

adv. 早已，已经，先前；

例句
He has already voted by absentee ballot...
他已进行了缺席投票。