Lucy knows how to add and substract but fractions have her up a stump.
做加减法，露西不成问题，可分数却难倒了她。
Substract: Venture Capital in the forestry Hi-Tech industry has been studied in this article.
本文对我国林业高新技术产业创业投资问题进行了研究。
Differences in performance between coated tools explained through a separate consideration of substract and coating influences.
通过分别考虑基体和涂层的影响，阐明了涂层刀具之间性能的原因。
The invention provides a magnetic element capable of reducing configuration area relative to a mounting substract and realizing high density mounting.
本发明提供一种减小针对安装衬底的配置面积、可实现高密度安装的磁性元件。
Objective:To evaluate the clinical value of Digital substract angiography (DSA) and endovascular stent placement (ES) in the diagnosis and treatment of aortic dissection.
目的：探讨数字减影血管造影（DSA）和经皮带膜内支架置入术（ES）在主动脉夹层诊断和治疗中的应用价值。
According to the lowest driving speed allowed by the routes and the stroke curve of add-substract speed of the trucks, we have determined the length of climbing roadway with the graphic method.
文中根据路线允许最低车速和载重车的加减速行程曲线，用图解法确定爬坡车道的长度。
According to the lowest driving speed allowed by the routes and the stroke curve of add-substract speed of the trucks, we have determined the length of climbing roadway with the graphic method.
文中根据路线允许最低车速和载重车的加减速行程曲线，用图解法确定爬坡车道的长度。
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