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Update ch9-01.md

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Hanlei Qin 2017-12-05 23:20:21 +08:00 committed by GitHub
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@ -41,10 +41,10 @@ Alice存了$200，然后检查她的余额，同时Bob存了$100。因为A1和A2
```
Alice first Bob first Alice/Bob/Alice
0 0 0
A1 200 B 100 A1 200
A2 "=200" A1 300 B 300
B 300 A2 "=300" A2 "=300"
0 0 0
A1 200 B 100 A1 200
A2 "= 200" A1 300 B 300
B 300 A2 "= 300" A2 "= 300"
```
所有情况下最终的余额都是$300。唯一的变数是Alice的余额单是否包含了Bob交易，不过无论怎么着客户都不会在意。