[填空题]
Some elementary particle theofa.ja/i0mp.d8 qz ygol0)jq :ries qvz,)pn-of20 r rpw )/wwnwu7suggest that the proton may be unstable, with aw )n-onv0,w p rzr/wp7q2ufw ) half-life $10^{32}\ \text{yr}$. How long would you expect to wait for one proton in your body to decay (consider that your body is all water)? $\Delta t = $ $ \times 10^{3}\ \text{yr}$
