One way to hold this word: two viewpoints, a short distance apart, looking at the same thing at the same moment. Each viewpoint gets a slightly different picture. Put the two pictures back together and the thing stops being flat — it gains front and back, near and far. Your two eyes do this every second. A twin-lens camera copies it. An old viewer card stores it and hands one picture to each eye. Wherever stereoscopic appears, look for that pair.
一種想法是：兩個視角，隔開一小段距離，同一時間看同一個東西。兩邊拿到的畫面差一點點，把它們疊回去，東西就不再是平的——有了前後、有了遠近。你的兩隻眼睛每一秒都在做這件事；雙鏡頭攝影機是把它搬進機器；老式的立體照片卡則是先把兩張畫面存起來，再一眼給一張。看到 stereoscopic，就去找那個「一對」。
登入就可以看每一支怎麼連回核心畫面。