关于by的短语意思by hand 和 little by little？

一、by hand

(1) 用手工(即不是用机器或其它手段).如：

The letter was written by hand.这封信是用手写的(即不是打印的).

My shoes were made by hand.我的鞋是手工做的(即不是机器做的).

(2) 用专人(即不是通常邮寄等).如：

Did the letter e by hand or through the post?这封信是专人送来的还是邮寄来的?

二、little by little,逐渐地

例句与用法:

His English is improving little by little.

他的英语渐有提高.

Little by little the snow disappeared.

雪渐渐消失.

He has changed year by year and little by little.

他随时间逐渐改变.

Little by little; gradually.

一点一点地；逐渐地,7,