V to lengthen or extend (a speech, etc); prolong in time 延长
The essentiality of protracting curve was known.
绘制曲线的重要性是众所周知的。
The database has the function of curve fitting, protracting, storage, and management, and is useful for digital management of packaging lab.
该数据库具有各种缓冲材料数据拟合、绘制、存储、管理等功能，有助于实现包装实验室数字化管理。
The article proves that the new cutter is applicable for ephedra reaping by protracting the cutting graph of new cutter and calculating stubble heights.
通过绘制这种新型切割器的切割图和计算割茬高度，论证了该新型切割器适用于收割麻黄草的可行性。
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