[填空题]
Protons are injected into the 1 af2grny1g0wl v .yfq8c+8w9 m.0-br*fm. z- s,t3orgq-u,r 0veakm-radius Fermilab Tevatron with an energy of 150 GeV. If they are accelerated by 2.5 MV each revolution, how fa m30-gabrzfv.- t,eqrurso,*r do they travel and approximately how long does it take for them to reach 1.0 TeV? d$\approx $ $ \times 10^9\ \text{m}$
