时间

准确值

3.979950

0.810462

2.579007

0

3.979927

0.810438

2.578941

5

3.980021

0.810474

2.579062

10

3.980116

0.810511

2.579183

15

3.980211

0.810548

2.579304

20

3.980306

0.810584

2.579425