arc
n. 弧；弧形物；（電）弧光

arch
n. 拱，拱門，拱形結構
an arch bridge 拱橋
[同]bow
v. 拱起，（使）成弓形
Horses arch their necks. 馬拱起頸脖。
v. 用拱連接，橫跨
A bridge arches the river. 橋橫跨在河上。

architect
n.建筑師；（喻）締造者，設計師，創造者
[同]founder

architecture
n. 建筑學，建筑術；建筑物；建筑式樣

arctic
adj. 北極的，北極區的；極冷的
an arctic wind 寒風

array
vt. 部署（軍隊等）以備作戰，列陣
The soldiers were arrayed on the opposite hill. 士兵被部署在對面山頭上。
vt. 穿著，盛裝
arrayed like a queen 盛裝如皇后
[同]dress
[難點]
an array of … 一大批，一系列

ascend
v. 攀登，上升
The airplane ascended into the cloud. 飛機高高飛入云端。
[反]descend
v. 追溯（to）

ascertain
vt. 查明，弄清，確定
ascertain where the trouble lies 弄清毛病所在
[同]find out

ascribe
vt. 把…歸于
[同] attribute
[考點]
ascribe … to sth 把…歸功于，歸咎于，歸因于
They ascribe his success to good luck. = His success was ascribed to good luck.
他們把他的成功歸因于幸運。

ashore
adv. 在岸上，上岸
go ashore 離船上岸，登岸

ass
n. 驢；
[同]donkey
n. 愚蠢的人，固執的人
[同]idiot
[難點]
make an ass of oneself 出洋相，做蠢事
make an ass of sb. 捉弄某人

assassinate
vt. 暗殺[同]murder
vt. 中傷，破壞（名譽等）
assault
n. 猛烈而突然的攻擊
They made an assault on the enemy’s positions.
他們突襲敵人的陣地。
[同]attack
v. 襲擊，突襲
[同]assail
[難點]
make an assault on/upon… 攻擊…，襲擊…

assert
vt. 宣言，斷言
assert one’s innocence 聲明自己的清白
[同]declare
vt. 維護，主張，堅持
[同]maintain
[難點]
assert oneself 堅持自己的權利，堅持己見

assessment
n. 估計，評估，估計數額
[同]estimation
[難點]
make/take an assessment of 對…進行估計、評估

assumption
n. 假定，假設
[同]supposition
n. 承當，擔任
the assumption of office 就職
n. 自負，傲慢
[難點]
on the assumption that… 假定…
on the condition that… 以…為條件

assurance
n. 自信，把握，胸有成竹
He answered all the questions with assurance. 他有把握地回答了所有的問題。
[同]self-confidence
n. 承諾，擔保，保證
We had his assurance that he would help us.
我們得到他愿意幫助我們的承諾。
[同]guarantee
（律）不動產轉讓（證書）