aroma n. 芳香，香味
The whole house was filled with the aroma of coffee.
满屋子都是咖啡的香味。
articulate adj. 表达能力强的
Articulate speech is very important.
清楚的表达能力是非常重要的。
ascertain vt.弄清，确定，查明
I ascertained that she was dead.
我断定她已经死了。
attest vt. & vi.作为或提供某事物的证明
Several witnesses can attest to her good character.
好几位证人证实她品行端正。
audacious 有勇无谋的，冒失的，厚颜无耻的
The protectorate was so audacious as to provoke its controlling state in a game of twisting the lion's tail.
这个保护国如此大胆，竟敢作冒犯其宗主国的尝试。