They're not wood at all but a hollow-core composite material with amazing structural strength and durability.

所有这些不是木头，而是有着惊人的结构强度和耐久性的一种空心核心合成材料。

youdao

They're not wood at all but a hollow-core composite material with amazing structural strength and durability.

所有这些不是木头，而是有着惊人的结构强度和耐久性的一种空心核心合成材料。

youdao