n.素炼；塑炼；咀嚼（作用）

Mastication is the mechanical breakdown of food in the mouth by chewing.
消化是通过咀嚼在口腔中对食物进行机械性分解的过程。
The teeth play a crucial role in mastication, as they grind and crush the food particles.
牙齿在咀嚼过程中起着关键作用，它们研磨和粉碎食物颗粒。
She demonstrated proper mastication techniques to her students, emphasizing the importance of thorough chewing.
她向学生展示了正确的咀嚼技巧，强调了充分咀嚼的重要性。
His dental problems made it difficult for him to perform efficient mastication.
他的牙齿问题使他难以进行有效的咀嚼。
Mammals exhibit a high degree of masticatory efficiency due to their specialized teeth and jaw structure.
哺乳动物由于其特化的牙齿和下颌结构，具有很高的咀嚼效率。
The food was so tough that it required considerable mastication before swallowing.
食物太硬了，吞咽前需要大量的咀嚼。
Mastication not only helps with digestion but also aids in the absorption of nutrients.
咀嚼不仅能帮助消化，还能促进营养物质的吸收。
Some animals, like cows, have a complex masticatory system designed for grinding plant material.
有些动物，如牛，拥有复杂的咀嚼系统，专为研磨植物材料而设计。
Dental hygiene is essential for maintaining good masticatory function throughout one's lifetime.
口腔卫生对于一生保持良好的咀嚼功能至关重要。
Dentists often recommend exercises to strengthen the muscles involved in mastication to prevent jaw problems.
牙医常常建议锻炼咀嚼肌肉以防止出现下颌问题。