curly grain的用法和樣例：
例句
- The ripple wavelengths on the ceramic surfaces, which were influenced by the mechanical properties and material grain size, were less than those on the metallic surfaces.
相同的沖蝕磨損條件下，脆性材料表面衝擊波紋的波長和周期比塑性金屬材料的都要小。 - Species include Red Oak, White Oak, Ash, Hard Maple, Soft Maple, Hickory, Cherry, Basswood, Beech, Birch, Curly Soft Maple, Butternut , White Pine, etc.
品種包括紅橡，白橡，水曲柳，硬楓，軟楓，山核桃木，櫻桃木，椴木，山毛櫸，樺木，波紋軟楓，白鬍桃，白松木等。
