"It's my ulcer," he added by way of explanation.是什么意思？

"It's my ulcer," he added by way of explanation.

“那是因为我得了溃疡，”他补充解释说。

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。

ulcer

n. <医>溃疡，腐烂物，道德败坏；

例句
The ulcer had been troubling her for several years.
溃疡已经折磨她好几年了。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

added

adj. 更多的，附加的，额外的；v. 加，加入，增加，添加；

例句
Since 1908, chlorine has been added to drinking water...
自1908年以来氯就被添加进饮用水当中。

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

way

n. 道路，方法，方向，某方面；adv. 远远地，大大地；

例句
The way that American history is taught may change in order to accommodate some more of those cultures.
美国历史的授课方式可能会为了照顾到更多的文化而作改变。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

explanation

n. 解释，说明，辩解，（消除误会后）和解；

例句
Mr Byers last night demanded an immediate explanation from the Education Secretary...
昨晚拜尔斯先生要求教育大臣立刻作出解释。