Invisible unless you're very, very close: one rebellious student determined
to score highly wrote the answers to exam questions on the back of a calculator
in pencil.
除非你特别靠近，否则是无法察觉的：一个叛逆的学生为了得高分，将考试的答案用铅笔写在了计算器的背面。
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The answer's on the tip of my...thumb: this student put minute algebraic
answers on their nail.
The rector of Rangsit University in Thailand revealed this week that some
3,000 students will have to re-sit exams after students were caught with Smart
watches and Mission Impossible glasses.
Even harder to see: ultra-violet pens are perfect for writing secret
messages, although you do need a torch to read them, which surely might see
suspicion aroused.
发表于 2016-7-10 18:44:24
