互换
- na.exchange; interchange
- 网络swap; swaps; reciprocate

互换
1.interchange; counterchange; mutual exchange; double replacement; exchange; interconversion; reciprocate; transposition; permutation
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29