Let $\mathfrak{M}$ be a countable transitive model of set theory. Let $L$ be some countable language and $M$ be a countable (in $M$) $L$-structure. My question is: 1.In $\mathfrak{M}$ can we carry the construction of Scott sentence of $M$ $\sigma(M)^\mathfrak{M}$? 2.. Is $\sigma(M)^\mathfrak{M}$ identical with the Scott sentence of $M$ $\sigma(M)$ in the real world?