His father began to lose his memory bit by bit, becoming increasingly forgetful.是什么意思？

His father began to lose his memory bit by bit, becoming increasingly forgetful.

他的父亲开始一点点地失去记忆，变得越来越健忘。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

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

father

n. 父亲，祖先，（尤指天主教和东正教的）神父，天父；vt. 成为父亲，创立（新思想），创造，发明（新方法）；

例句
Janet had been abused by her father since she was eleven.
珍妮特从11岁起就遭受父亲虐待。

began

v. 开始( begin的过去式 )，着手，创始，创办；

例句
He began comically ad-libbing a script...
他即兴调侃起了一段剧本。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

lose

vt. 失去，错过，遗失，耽搁；vi. 损失，输掉，走慢，降低价

例句
Without more training or advanced technical skills, they'll lose their jobs.
没有进一步的培训或高级技能的话，他们就会丢掉工作。

memory

n. 记忆，记忆力，回忆，往事，[计]存储器，内存；

例句
It is the memory and threat of persecution that binds them together.
遭受迫害的记忆和威胁把他们紧紧联系在一起。

bit

n. 一点，一块，少量，少许，一会儿，一转眼，[计] 比特（二进位制信息单位）；adj. 很小的，微不足道的；adv. [口语]相当，有点儿，或多或少，多少[a bit to的省略]；vt. 给（马）上嚼子，上衔铁，抑制，制约；v. 咬，叮( bite的过去式)，刺痛，咬饵，有咬（或叮）的习性；

例句
I've come looking for a bit of advice.
我特来讨教。

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

becoming

adj. <正>（衣服等）相配的，合身的，合适的，与…相称的；n. <哲>（变化过程的）形成，发生；v. 变为，成为( become的现在分词 )，适合，使（人）显得漂亮，使好看；

例句
He had discovered politics and was rapidly becoming absorbed by it...
他接触到了政治并且迅速地对它着了迷。

increasingly

adv. 越来越多地，日益，格外，越来越…，愈；

例句
Theirs had been an increasingly attenuated relationship.
他们的关系日益冷淡。

forgetful

adj. 健忘的，好忘事的，<正>疏忽的，不经心的；

例句
My mother has become very forgetful and confused recently.
我妈妈近来变得非常健忘，糊里糊涂。