当然，早期工程师并不是幼稚无知的，他们也意识到存在不期而至的入侵者肆意破坏的潜在危险。
Early engineers were not naive, of course, and realised the potential dangers of unwanted interlopers poking around.
我从前常以为它们细长的树梢，已经逼近天空；虽然那只是孩子的幼稚无知，但是现在却少有那般快乐我知道儿时离我那么近的天堂，如今已经越来越远了。
I used to think their slender tops were close against the sky: it was a childish ignorance, but now this little joy to know I'm farther off from heaven than when I was a boy.
我们伴着校园的钟声从初入校门时的幼稚无知走到现在的成熟稳重，似乎经历了人生的蜕变，生活的飞跃。
We grew to maturity from those days when we firstly came in the campus gate to now. it seems that we have experienced a transformation in life and a leap in livelihood.
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