Sentence 1: TS can be measured theoretically for numerical targets such as spheres and cylinders , but in practice , it is usually calculated empirically or derived with simple models .
Sentence 2: Theoretically , TS can be derived for simple targets such as spheres and cylinders , but in practice it is mostly empirically measured or calculated with numeric models .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?