arch keystone

基本解釋

• 拱頂石

英漢例句

雙語例句

• To effect change means not just replacing the keystone but painstakingly rebuilding the arch.
  施行改革并不只是更換一塊拱心石，而是要費心費力的重新建立一個拱門。
• A wooden frame built especially to support the sides of an arch until the keystone is positioned.
  支拱板條專門用來在拱頂石放置好以前支撐拱的兩邊木架子。
• Pennsylvania's nickname is the Keystone State. Just as a keystone holds together a stone arch, Pennsylvania was seen as holding together the young American republic.
  賓夕法尼亞州的別名是“拱心石之州”。就如拱心石支撐起石拱一樣，人們認為賓夕法尼亞支撐起了年輕的美利堅共和國。

原聲例句

• Just as a keystone holds together a stone arch, Pennsylvania was seen as holding together the young American republic.

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專業(yè)釋義

土木建筑工程

• 拱頂石