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[00:00.00]Chapter 9 Database Management System [00:03.07]第九章 数据库管理系统 [00:06.14]Dialogue 1 [00:07.82]句型1 [00:09.51]A:Hey ,Greg , Check out my new wallpaper! [00:12.43]嘿,Greg,看一下我屏幕的新背景画面! [00:15.
Fade - This is a reduction in the received signal. It is caused by absorption, refraction, or reflection. Fax - This is a shortening of Facsimile, and it refers to one fax machine sending a digital re
Email - This is electronic-mail, that is text messages that are sent over the internet. Emoticons - This is a contraction meaning emotional icon that is made with common characters, such as :-) being
This is Scientific Americans 60-Second Science. Im Christopher Intagliata. Got a minute? Theres one message waiting for you. Imagine that you wanna send a secret message to your colleague at the CIA. You can encrypt it to prevent counterspies from re
Key Sentences(重点句子) 142.There seems to be something wrong with the toilet. 我房间里的抽水马桶好像出了点毛病。 143.We'll send someone to repair it immediately. 我们会马上派人来修的。 144.What's the tro
Imagine that you want to send a secret message to your colleague at the CIA. You can encrypt it to prevent counterspies from reading it. But they'll still know you were sending some sort of message. There's a better optionsteganographywhich means hid