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知識點：
1. pointless adj. 無意義的
例句：I've already made up my mind; it's pointless to argue with me. 我已下定了決心，再和我爭論沒什么意義了。
2. ignorant adj. 不知道的、無知的、愚昧的
例句：He was ignorant of the fact that the school was closed for the day. 他不知道今天學校不開門。
3. skim v. 瀏覽；略讀
例句：She forgot to study, so she had to skim over her material five minutes before the test. 她忘了復習，所以不得不在考前五分鐘把參考資料再瀏覽一下。
4. all the rage 風行一時；流行
例句：This new cell phone is all the rage right now. 這款手機是目前最流行的款式。
5. get one's hands on... 獲得……；得到……
例句：I get my hands on the newest model of laptop. 我拿到最新款的筆記本了。
n. (水、氣、電)流，趨勢
adj. 流通的
