base course

基本解释

Base; road Base [highways]: The part of the road structure Below the Base course and above the sub-base.
路床[公路]：基层之下底基之上的道路结构部分。
The Semi-rigid Base course material made of Lime-fly-ash bound macadam has been widely used in highway construction of China for its high workability and notable economic benefits.
半刚性路面基层材料——二灰碎石以其优良的工作性能和显著的经济效益在我国道路建设中得到了广泛应用。
Cement-stabilized crushed stones course have two distinct advantages which are high intensity in base course and good moisture susceptibility, so it is used widely in our highway construction.
水泥稳定碎石基层因其具有较高的强度和较好的水稳定性等特点，在目前我国半刚性路面高等级公路的建设中得到广泛的应用。

Now, of course, there are denominator issues here because we started with a much higher base rate than these other countries, but if you think about the size of the populations there, the number of people who are going to become diabetic in the next twenty-five years is really very frightening.
现在,当然这里存在着分母的问题,我国的增长基数比其他国家要大得多,因为一旦考虑到人口总量,在未来25年成为糖尿病人的人数,就非常非常的惊人了
耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Engaging a customer base is of course a very important part of social media.
FORBES: Engagement Marketing Fever - Are Marketers Finally Catching It?
And of course a growing tax base would make it much easier to cover the construction costs.
FORBES: Silicon Valley Is Stuck In An Uncanny Valley Of Density
And she went in with a tremendous base of fundraisers, and of course the advantage of being Bill Clinton, former president's wife.
NPR: The 2008 Candidates and the Money Game

基层
Finally, the construction technical process and maintenance process on base course suiting the practical spot are presented that based on the evaluation of technology and economy.
从技术、经济方面综合考虑，提出与当地实际的环境条件相适应的基层施工工艺及其养护措施。
路面下层

基层
In the garbage for urban road construction, this paper main study about use it for base course and subbase course of urban road.
在建筑垃圾用于城市道路方面,主要将拆迁现场产生的建筑垃圾用于城市道路的路基和底基层。
土木建筑工程
基层
承重层