a 中文意思是什麼

a 解釋
an 用在以母音音素開始的詞前〉 indefinite art. 1. 〈普通可數名詞第一次提到時,冠以不定冠詞主要表示類別,有時則兼含「一」的概念〉: This is a transformer. 這是變壓器。
Ours is a developing country. 我國是個發展中的國家。
A house 一所住宅。
An army 一支軍隊。
2. 〈在數量概念上,說明表示時間、距離、重量及數目的名詞〉一。
A thousand 一千。
An hour 一小時。
A mile 一英里。
A pound 一磅。
3. 〈與數量形容詞、數詞等連用而表示一個整體單位〉: a dozen times 十二次。
A great many years 許多年。
A ten years is not so long. 十年的時間並不算怎麼長。
4. 〈與某些復數名詞連用而仍表示一個單位〉: a glassworks (一家)玻璃廠。
A falls in the river 河中的瀑布。
5. 〈與序數詞或形容詞最高級結合共同限定所修飾的名詞〉: He tried to jump up a third time. 他試圖作第三次的跳高動作。
It was a most beautiful sight. 這是一個最美麗的景緻。
6. 〈表示同類事物中的代表〉任何一個[種]。
A horse is useful. 馬是有用的。
7. 同一的,相同的: We are all of a mind. 我們大家一條心。
Of a size (屬于)同一大小。
Birds of a feather 同一毛色的鳥。
8. 〈兩件成套的東西,用 and 連接,仍視為一個單位〉一(副)。
A cup and saucer 帶茶托的茶杯。
9. 〈抽象名詞用作普通名詞,表示類別,例證〉: Would you do me a kindness? 你能幫我一下忙嗎? A virtue 一種美德。
10. 〈用於專有名詞前,以整體概括個體,表示類似的一個或某一個〉: a Mr. Smith 一位叫史密斯的人。
A Newton 像牛頓那樣的人。
A Ford 一輛福特汽車。
11. 〈與 how, what, such, too, so, quite, rather 以及 half 等搭配使用時,常置於各該詞的後面〉: So beautiful a jewel! 多麼好看的寶石! How great a man he is! 他真是偉人! Rather a queer fellow 十分古怪的傢伙。
Half an hour 半小時。
12. 〈在習慣用法上,相當于介詞 in, for, on 的作用〉每(…),在…內,按(…而論),換(得)。
Three times a day 每天三次。
Five dollars a catty 五元美金(買)一斤。
Twice a year 一年內兩次。
13. 〈口語〉一客: an ice 一客冰淇淋。

  1. She rose and took a tentative step backward.

  2. He asked a little about my life history.

  3. He forced a laugh to his shaking lips.

  4. Bismarck ruled germany by a strong hand.

  5. A stormy applause broke out in the hall.

  6. We 've pulled you through a near squeak.

  7. There was a record playing in the next room.

  8. With a nod he vanished into the bedroom.

  9. I have a snag in my best black tights.

  10. His problem began when he was a child.

  11. The all-welded, a-frame pylon straddles the deck.

  12. The a-frame pylon harmonizes with the tall spires of the adjacent cathedral.

  13. Mobile front-bucket loaders often suffice for handling and retrieving rock in a-frame structures.

  14. Raven calls dresselhaus a “ foremost role model. ” director of the missouri botanical garden and current president of the aaas, raven was secretary of the national academy when dresselhaus was treasurer

  15. In addition to provide a website for each published paper, the press of aaas also trys out to set a website for each author, so more detailed introdution for the author and hyperlinks to his her articles can be provided

  16. In addition to provide a website for each published paper, the press of aaas also trys out to set a website for each author, so more detailed introdution for the author and hyperlinks to hisher articles can be provided

  17. In this paper, the concept of acceleration ambiguity function ( aaf ) and acceleration resolution is put forward for the first time. using aaf, the effects of target ' s relative acceleration on several outputs of a linear - phase matched filter are analyzed, such as the output signal - noise - ratio loss, the doppler resolution, the constraint on optimal accumulative time ( opt ) and their tolerable limits

  18. The representation of aaf and its resolution not only enriches relative theory of radar signal processing and is instructive in radar parameter design and performance analysis, but also provides a practical method to quantitatively evaluate the acceleration effects on signal processing

  19. The seeker now weighs just 8 kg and has been designed to replace the ir seeker on a conventional short - range aam

  20. Based on the analysis of the theory and capability of asm & aam, a new method is put forward by combination of local texture model and global texture model