fir造句

The box is made out of China fir wood.
这盒子是用杉木做成的.

Bolman has studied regional variation in Douglas fir seed yields.
鲍尔曼曾研究过道格拉斯冷杉种子产量地区间的差异.

The growth of spruce and fir needles is determinate.
云杉和冷杉的针叶生长是有限的.

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