It is difficult to ensure the machining accuracy of large diameter and thin-walled components due to their easy-to-occur characteristic of deformation during machining.
大直径薄壁零件由于存在加工过程中容易变形的特点，难以保证其加工精度。
Using traditional plumb lines in elevator guide rails' installation is difficult to ensure the installation accuracy, wasting time and Labour.
电梯导轨安装精度以往多采用吊线锤法，一般很难保证导轨的安装精度，且费时、费力。
To ensure the location accuracy of edge and minimize false edge points produced by noise and uneven gray scale in image is a difficult problem for edge detection.
如何在确保边缘精确定位的同时，最大程度地抑制噪声以及图像灰度不均匀所产生的伪边缘点，是当前边缘检测所面临的难题。
The traditional methods measure semantic similarity by computing semantic distance between nodes, which are difficult to ensure the accuracy of computation.
传统的语义相似度计算方法大都利用结点间的语义距离来衡量，难以保证计算的准确性。
The traditional methods measure semantic similarity by computing semantic distance between nodes, which are difficult to ensure the accuracy of computation.
传统的语义相似度计算方法大都利用结点间的语义距离来衡量，难以保证计算的准确性。
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