从小: from childhood, from a young age...
试点: test point, to carry out trial, pilot scheme...
奴隶: slave...
密度: density, thickness...
降落: to descend, to land...
挺拔: tall and straight...
惨白: deathly pale...
以为: to think (i.e. to take it to be true that...) (Usually there is an implication that the notion is mistaken – except when expressing one's own current opinion.)...
初衷: original intention...
无所事事: to have nothing to do, to idle one's time away (idiom)...
