[填空题]
From the known value of atmospheric pressure at thq:u.cpzo kz 6 lm5 /*rp)a1ypk2z7rkke surface8l fl en4 l.j93nubfj3 of the Earth, estimate the total nl94 jllj b3.3n8fufneumber of air molecules in the Earth’s atmosphere. $ \times10^{44 }$ molecules