Turning to the eastern part of the museum, only the reading room on the second floordemonstrated no change, below which,
”The virtual images of the aperture seen from the front“即是entrance pupil(入瞳徑)兩隻焦距一樣(實際上會略有誤差,±5%左右)的鏡頭,管你前組玻璃大小,入瞳徑都是一樣的
amusement park遊樂場entrance入口entrance ticket入場券ferris wheel摩天輪roller coaster過山車merry-go-round/carousel旋轉木馬bumper cars/dodg