基层
- na.basic level; primary level; matrix
- 网络base course; substrate; subbase

基层
1.grass-roots unit; basic level; primary level
2.【生】substrate; matrix
3.【房】base course; foundation course
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29