朱坤的回答：

1、意思上的区别 两者都是“一点点地，逐渐地”的意思。还可以强调数量上的“一点点”。 2、用法上的区别 little by little在语句中做副词，常用于修饰动词、形容词、副词等。强调过程。 bit by bit做名词，强调数量。 3、例句 ①、little by little It?was?little?by?little?that?the?watch?reached?its?present-day?perfection.? 表渐渐地达到了现在这样完美的程度。 In?the?beginning?he?had?felt?well,?but?little?by?little?he?was?becoming?weaker? 一开始他感觉很好，但慢慢地就变虚弱了。 ②、bit by bit Bit?by?bit?I?began?to?understand?what?they?were?trying?to?do.? 我逐渐明白了他们想要干什么。 The?materials?have?been?gathered?bit?by?bit.? 这些材料是点点滴滴收集来的。

Zzy的回答：

a little bit:一点点儿 a little bit+ 形容词/副词 the teacher is a little bit angry.老师有一点点生气 the house is a little bit small. a bit little:有点小,有点少 the cat is a bit little .i'm afraid it can't catch mice.

刘忠田的回答：

两者都是“一点点地,逐渐地”的意思。 前者是指"a piece at a time;gradually"（强调过程） 例：bit by bit As the mist cleared, the house came into sight bit by bit. 随着雾散天晴, 房舍逐渐呈现在眼前。 Bit by bit, the group accepted the idea. 渐渐地, 大家接受了这个想法。 后者指"slowly;grandually"（强调数量） 例：little by little the snow disappeared.雪渐渐融化.The water level rose little by little. 水面渐渐地升高。

楼龙的回答：

都是“一点点地,逐渐地”的意思 前者是指"a piece at a time;gradually"（强调过程） 后者指"slowly;grandually"（强调数量）:little by little the snow disappeared.雪渐渐融化.

邱世凯的回答：

都是一点点的 bit by bit 感觉单位更小一些