through beam的用法和樣例：
例句
- In a continuous beam the vertical deflexions at the rigid supports must be zero.
在連續梁中，剛性支承處的垂直變形必須為零。 - The concrete continuous beam in the elevated bridge of the South-North Line of Nanjing subway is firstly tasted in China.
摘要南京地鐵南北線一期工程高架區段首次在國內採用了預應力混凝土連續梁的型式。
