roof beam

基本解釋

At last they got to the point of installing the roof beam .
最後，工程進行到安裝屋頂大梁這一緊要步驟了。
He said, My friends, we cannot use fresh green wood to make the roof beam .
他說：朋友們，新鮮的木材來不能用來制造，它會變彎竝下陷的。
Then he secretly constructed the most important part of the building, the roof beam that would hold the roof together.
然後，他私下造好了工程中最重要的部分–支撐整個屋頂?shù)拇罅骸?/li>
權威例句
Sound danced from floor to roof beam.
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