intelligent(adj.) 智商高、課業表現很好、有才智的
英英字典怎麼解釋：
showing intelligence, or able to learn and understand things easily.
很有智力，能夠很輕易地瞭解事情
Although Leonard is not very intelligent, he studies hard to catch up with other students.
Leonard 雖然不是非常聰明，但他為了追趕上其他學生而很努力學習。
If you have difficulty in doing math, you can ask Anna. She is intelligent.
如果你對數學不大擅長，你可以去請教 Anna，她很聰明。
knowledgeable(adj.) 知識淵博的、見多識廣的
英英字典怎麼解釋：
knowing a lot.
懂很多事
Danny is knowledgeable about the chemistry of metals.
Danny 對金屬的化學性質知之甚多。
Duncan is a knowledgeable professor.
Duncan 是一位學識淵博的教授。
brainy(adj.) 有頭腦的、腦筋動得快的(多用於口語)
英英字典怎麼解釋：
having or showing a well-developed intellect.
擁有很棒的理解力
Gasol is a brainy boss, he managed many projects that keep the company in the black.
Gasol 是一個腦筋轉很快的老闆，他制定許多讓公司賺錢的計劃。
＊補充＊
in the black 指的是有盈利，讓公司持續在賺錢的狀況！反義詞則是 in the red，也就是我們所熟悉的「財務赤字」唷！
witty(adj.) 富於機智的、幽默詼諧的
英英字典怎麼解釋：
using words in a clever and funny way.
說話充滿機智與趣味
Ginobili is so witty. I think I am in love.
我想我愛上機智幽默的 Ginobili 了。
A witty woman is a treasure; a witty beauty is a power.
聰慧的女人是個寶；聰慧的美人是力量。
