metal structure的用法和樣例：
例句
- On exceeding the critical temperature,the structure of the metal begins to change.
一當超過臨界溫度，金屬結構就開始改變。 - The welding process of the common fillet welds along three orthotropic directions for the large-scale metal structure was simulated by finite element method.
摘要對大型金屬結構中常見的三向正交角焊縫的焊接過程進行了有限元模擬。
