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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。
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。
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。
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。
n. 津贴，零用钱，允许，限额，折扣，允差，考虑 <
