curly grain的用法和样例：
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.
相同的冲蚀磨损条件下，脆性材料表面冲击波纹的波长和周期比塑性金属材料的都要小。 - Species include Red Oak, White Oak, Ash, Hard Maple, Soft Maple, Hickory, Cherry, Basswood, Beech, Birch, Curly Soft Maple, Butternut , White Pine, etc.
品种包括红橡，白橡，水曲柳，硬枫，软枫，山核桃木，樱桃木，椴木，山毛榉，桦木，波纹软枫，白胡桃，白松木等。
