重点讲解：
1. be good at 擅长的；精通的；能干的；
例句：Most of the students in this class are good at mathematics.
这个班的学生多半数学很好S].&#*Zb~T00lUJ2gnR)。
2. used to do sth. 过去常常；过去曾；
例句：I used to stay up late with my mom and watch movies.
我以前总是和妈妈一起熬夜看电影@h=lrT_0.&!]&NV。
3. make sure 一定要；设法保证；
例句：You have to make sure you're comparing like with like.
你必须确保是在进行同类比较t*z3|JnQ9o*w|X]Z-。
4. get adapted to 适用于…的；适合…的；
例句：The Indians had to get adapted to a new climate as they moved south.
当印第安人往南迁移时,他们必须习惯新气候1mG+vG~cyM~0m0|Wc_l。