都是“一點點地，逐漸地”的意思。little by little是指“a piece at a time；gradually”，強調(diào)過程。bit by bit指“slowly；grandually”，強調(diào)數(shù)量。

1、意思上的區(qū)別

兩者都是“一點點地，逐漸地”的意思。還可以強調(diào)數(shù)量上的“一點點”。

2、用法上的區(qū)別

little by little在語句中做副詞，常用于修飾動詞、形容詞、副詞等。強調(diào)過程。

bit by bit做名詞，強調(diào)數(shù)量。

3、例句

①little by little

It was little by little that the watch reached its present-day perfection.

表漸漸地達到了現(xiàn)在這樣完美的程度。

②bit by bit

The materials have been gathered bit by bit.

這些材料是點點滴滴收集來的。

little by little the snow disappeared.雪漸漸融化。

The water level rose little by little.水面漸漸地升高。

little adj. 小的；很少的 adv. 完全不；不多；有點 n. 少許，不多 quant. 一點 pron. 少量，一點兒；

bit adj. 很小的；微不足道的 adv. 有點兒；相當 quant. 一點 n. 小塊，一個

a little/little + 不可數(shù)名詞

a little + 不可數(shù)名詞 = a bit of + 不可數(shù)名詞 quite a few 很多 only a little/a few 很少 a bit/a little 修飾動詞