英 [sain ʌp] 美 [saɪn ʌp] 跟…簽訂合同; 報名;雙語例句1. He has posted a sign up that says "No Fishing" 他已經張貼了一張“禁止釣魚”的告示牌。2. They manage to sign up all the best performers. 他們設法跟所有最佳演員簽訂合同.3. He was not the only one to sign up. 報名參加的不光是他一個人.4. Can I sign up for this course in advance? 我能事先申請上這一課程 嗎 ?5. You don"t sign up for life, you know. 你用不著參加一輩子的, 你知道罷?
二、sign in
英 [sain in] 美 [saɪn ɪn] 透過簽字（使）取得入場權; 簽到; 畫到;雙語例句1. All the participants were required to sign in as they entered the hall to attend the meeting. 出席會議的人在進入大廳前均須簽到.2. In the meantime, would you sign in and register your ability? 同時你能簽下表格以便登記你的超能力 嗎 ?3. Clerk : Yes, you can"t miss it. There"s a big sign in front of it. 對, 你不會錯過的. 酒家正門掛著一塊很大的招牌.4. It imply the illegal word sign in the data. 資料中含有非法字元.5. Every student must sign in when he comes back to the college. 每個學生回到學校都必須簽到.
sign up的意思是跟…簽訂合同; 報名，sign in的意思是透過簽字（使）取得入場權; 簽到; 畫到。
一、sign up
英 [sain ʌp] 美 [saɪn ʌp] 跟…簽訂合同; 報名;雙語例句1. He has posted a sign up that says "No Fishing" 他已經張貼了一張“禁止釣魚”的告示牌。2. They manage to sign up all the best performers. 他們設法跟所有最佳演員簽訂合同.3. He was not the only one to sign up. 報名參加的不光是他一個人.4. Can I sign up for this course in advance? 我能事先申請上這一課程 嗎 ?5. You don"t sign up for life, you know. 你用不著參加一輩子的, 你知道罷?二、sign in
英 [sain in] 美 [saɪn ɪn] 透過簽字（使）取得入場權; 簽到; 畫到;雙語例句1. All the participants were required to sign in as they entered the hall to attend the meeting. 出席會議的人在進入大廳前均須簽到.2. In the meantime, would you sign in and register your ability? 同時你能簽下表格以便登記你的超能力 嗎 ?3. Clerk : Yes, you can"t miss it. There"s a big sign in front of it. 對, 你不會錯過的. 酒家正門掛著一塊很大的招牌.4. It imply the illegal word sign in the data. 資料中含有非法字元.5. Every student must sign in when he comes back to the college. 每個學生回到學校都必須簽到.