Microobjective
顯微物鏡
??? 情景例句
Hi, Frank.
嗨， Frank。
In books,are embalmed the greatest thoughts of all ages.
偉大思想古今有，載入書中成不朽。
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低點）、浪高（從波谷到浪峰的垂直距離）