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- The objective function in the unconstrained model of linear Support Vector Machine（SVM） is not twice differentiable which precludes the use of a fast Newton method. 摘要 線性支持向量機的無約束優化模型的目標函數不是一個二階可微函數，因此不能應用一些快速牛頓演算法來求解。
- The flight to Accra goes twice a week. 飛往阿克拉的班機一星期開兩班。
- We should brush our teeth at least twice a day. 我們每天應該至少刷兩次牙。
- I am more than twice as old as he. 我的年齡是他的兩倍還不止。
- Jack was fired twice but both times taken back. 傑克曾兩次被解僱，但兩次都被允許回去工作。
- The filly has been raced twice this season. 這匹小牝馬本季度曾兩次參賽。
- If I wee you, I'd think twice about it. 如果我是你我會三思而後行。
- The caretaker stokes up twice a day. 管理員每天往火里加兩次煤。
- Twice differentiation of symptoms and signs 二次辨證
- I go to the university twice daily. 我每天去那所大學兩次。
- He has been there at least twice. 他至少去過那兒兩次。
- She referred to it once or twice. 這一點她提到了一兩次。
- Our study group gets together twice a week. 我們的學習小組每周集中活動兩次。
- The old man goes to see his grandson twice a week. 這位老人每星期去看他的孫子兩次。
- This plant needs to be watered twice a week. 這種花一星期要澆兩次。
- She did twice as much work as her brother. 她乾的工作比她弟弟乾的多一倍。
- The housemaid comes to mop our kitchen floor twice a week. 女傭每周兩次到我家來拖洗廚房地板。
- Your wife has rung you twice since lunch time. 午飯後你太太已來過兩次電話了。
- You need to think twice of the matter. 這事你要三思。
- Big deal! I caught a fish twice that big last week. 了不得!上星期我釣到的魚有那條的兩倍大。
