本质上就是，您在一个特定的CSS选择器上创建一个“查询”，就能够得到一个匹配该条件的元素集。
Essentially, you create a "query" on a particular CSS selector, and you get back a collection of elements that match that criterion.
特斯拉的发明本质上就是一个旋转的变压器。
尼古拉·特斯拉发明的感应电动机本质上就是一台旋转变压器——首先在电动机的固定钢制外壳（定子）上安装上绕组，然后将导体安装入内轴（转子）。
Tesla's invention is, in essence, a rotating transformer. Its primary windings reside in a stationary steel casing (the stator) and and secondary conductors are attached to an inner shaft (the rotor).
在本质上，二次加权的M-估计器就是双向滤波器。
The re-weighted M-estimator is bilateral filtering in natural.
本研究项目就是针对煤矿特点研究本质安全型可编程序控制器，采取本质安全技术，使其适应煤矿井下恶劣环境条件；
According to the mine characteristics this research project made a study of intrinsically safety programmable controller, which is adaptive to atrocious environment and condition of mine underground;
本研究项目就是针对煤矿特点研究本质安全型可编程序控制器，采取本质安全技术，使其适应煤矿井下恶劣环境条件；
According to the mine characteristics this research project made a study of intrinsically safety programmable controller, which is adaptive to atrocious environment and condition of mine underground;
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