重点讲解：
1. bit by bit 一点点地；逐渐地；
例句：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S%z#dH[HZnuT%VszIa。
2. be familiar with 熟悉；熟知；
例句：Most people are familiar with this figure from Wagner's opera.
多数人都熟悉瓦格纳歌剧中的这一人物K)[90m43LE。
3. be good at 擅长的；精通的；能干的；
例句：You have to be good at spotting trouble on the way and heading it off.
你必须善于发现潜在的麻烦并加以化解H!a|(8X_vUU。
4. share with 与…分享；与…共享；
例句：The village tribe is friendly and they share their water supply with you.
村里的部落很友善，他们会和你一起分享水源K4Dkuzxhw|LE)Ij1KE3。