大家看到5月份口语轮换题中出现的describe a useful skill you learned in a math class from your primary or high school的时候，是不是已经绝望了…… 不光要让你回忆痛苦的数学课，还逼你说一个学到的有用技能!出题人简直太残忍了!不过最近刚好在微-博看到个视频，说不定可以帮到大家。里面讲了数学家利用乐高玩具和影子进行艺术创作，里面涉及到的数学计算和建模，就可以是我们这个题目中的skill哦：
I learned a pretty awesome skill from my math teacher in high school. He taught us how to create an artwork based on mathematical principles.
Our math teacher is really one of a kind, I mean, normally you might be bored out of your mind in math classes, but in his class, he could always find a way to spice things up and make everything about math intriguing.
It’s like making hand shadow puppets, but instead of using hands, we used small cubes. We carved three different shapes into the three faces that are next to each other, you know, the three faces that share one corner, and when you rotate this cube, you would see the shadows of the three different shapes in turn on the wall.
I still remember how thrilled we were when our teacher showed us how it worked. At fist, the small sculpture looks so abstract, I mean, we didn’t know what it was, but when the light was on, we saw a shadow in the shape of the letter ‘A’ on the wall, and then our teacher rotated the sculpture to a certain angle, and magically, the letter ‘D’ showed up on the wall. We were like ‘wow’, but there’s more, when our teacher rotated the sculpture again, we saw the letter C. That was quite a jaw-dropping performance for a bunch of high school students, you know.
The principle behind it is actually quite simple, but it’s a little bit hard to example without a 3-D model, so I’ll just skip that part. Anyway, after that class, all of us learned how to do this magic trick. I never thought math class could be so entertaining.
这个题目告诉我们要善于利用考官给我们的笔和小纸板，声情并茂的给考官上一堂生动的数学课，让他也感受一下出题人满满的恶意……
雅思口语语言点解析：
awesome = (especially NAmE, informal) very good, enjoyable, etc. 例如：
I just bought this awesome new CD!
Wow! That's totally awesome!
principle = a law, a rule or a theory that something is based on例如：
The principle behind it is very simple.
There are three fundamental principles of teamwork.
Discussing all these details will get us nowhere; we must get back to first principles (= the most basic rules).
one of a kind = the only one like this = unique 例如：
My father was one of a kind—I'll never be like him.
bored out of your mind = extremely bored
spice something up = to add interest or excitement to something例如：
He exaggerated the details to spice up the story.
Her conversation is always spiced with humor.
intriguing = very interesting because of being unusual or not having an obvious answer例如：
These discoveries raise intriguing questions.
an intriguing possibility
He found her intriguing.
driving under the influence = DUI = (in some states in the US) the crime of driving a vehicle after drinking too much alcohol. It is a less serious crime than ‘driving while intoxicated’.
deterrent = a thing that makes somebody less likely to do something (= that deters them)例如：
Hopefully his punishment will act as a deterrent to others.
the country's nuclear deterrents (= nuclear weapons that are intended to stop an enemy from attacking)
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