“…Let ( ρ , u , d ) be a strong solution to the Cauchy problem , , and , satisfying . If T ∗ < ∞ is the maximal time of existence, then with r and s satisfy Remark Compared with Gao‐Tao‐Yao's result, they can get any L p ‐norm of u ( p ≥1) because the domain is bounded. However, it is impossible for Cauchy problem, in order to overcome this difficulty, we need some weighted estimates of the velocity u .…”