bit-by-bit memory type

例句：

1. 1. We need to work onour project bit by bit until it's done.
   我们需要一步一步地完成这个项目。
2. 2. The teacherexplained the problem bit by bit to helpus understand better.
   老师一点一点地解释问题，以便我们更好地理解。
3. 3. The constructionwas completed bit by bit, and we were able towitness its progress.
   建筑是一点一点完成的，我们能够亲眼见证其进展。