urban commercial building的用法和樣例：
例句
- Until now, making ice at night to provide daytime cooling was limited to large commercial buildings that used chillers.
以前用冰製冷僅限於大型商業建築，到現在為止，較小的商業建築和住宅也開始試用了。 - In this picture, among many large commercial buildings, a college graduate is climbing upward with difficulty.
在這幅圖中，四周都是高聳的商業建築，一個大學畢業生正在期間艱難的向上攀爬。
