谷仓的屋顶由重型木材支撑。

The roof of the barn is supported by heavy ___timber.

他们在树林里建造了一间木框架小屋。

They constructed a ___timber-framed cabin in the woods.

一根巨大的木材被用作桥梁的主梁。

A massive ___timber was used as the main beam for the bridge.