?a.k.a.

a.k.a.發(fā)音

英：　　美：

a.k.a.中文意思翻譯

常見釋義：

abbr.亦稱；又名（alsoknownas）

a.k.a.雙語使用場景

1、The trouble is that Batman, a. k. a. playboy Bruce Wayne, has had it up to here with being the white knight.───問題是蝙蝠俠，另一個(gè)身份是花花公子的布魯斯。韋恩，如今對自己一直是正義騎士的形象已經(jīng)受夠了。

2、In more severe cases, patients may be advised to use over-the-counter antihistamines, a. k. a. motion sickness pills, he said.───他說，病情嚴(yán)重的話，建議病人服用非處方的抗組胺藥，即暈車藥。

3、Smell #3: People sit in the same places every day (a.k.a. my box, my chair)───臭味 #3: 大家每天固定位子就坐（一個(gè)蘿卜一個(gè)坑）

4、If Web 2. 0 was about creating data (a. k. a. user generated content), then the next generation of the Web is all about using that data.───如果Web2.0的本質(zhì)是關(guān)于數(shù)據(jù)的生成（也就是用戶生成內(nèi)容），那么下一代網(wǎng)絡(luò)則與數(shù)據(jù)的利用有關(guān)。

5、They chose "electronic warfare," A.K.A. "radar jamming," Cartwright said.───他們選擇了“電子戰(zhàn)”又名“雷達(dá)干擾，”卡特懷特說。

6、From the very beginning, Stuart Leslie Goddard, a.k.a. Adam Ant, knew he was going to be a star.───從一開始，斯圖爾特·萊斯利·戈達(dá)德，又叫螞蟻亞當(dāng)，就知道他將會成為明星。

7、The corporate lattice is a more agile and fitting model for career CEOs (a. k. a. you) to architect a rewarding 21st century career.───公司這種地方更適合運(yùn)作靈活的職業(yè)CEO（也就是你）來打造一份21世紀(jì)的璀璨事業(yè)。

8、RSS aggregators (a. k. a. RSS readers) take advantage of these timestamps to decide when new content is available.───RSS聚合器（就是RSS閱讀器）利用這兩種時(shí)間戳來鑒定什么時(shí)候有新的內(nèi)容。

9、Some people (a k a men) may have considered breasts to be simple things, not requiring such high-tech attention.───一些人（尤其男人）可能認(rèn)為，乳房只是簡單的事情，并不需要高科技的注意力。

為什么A為對稱矩陣，A的k次冪也為對稱矩陣了

A=A^T

(A^k)^T

=(A·A·A.....A)^T

=A^T·A^T·.....·A^T

=(A^T)^k

=A^k

所以

A的k次冪也為對稱矩陣。