1. TS can theoretically be derived for simple targets such as spheres and cylinders , but in practice it is mostly empirically measured or calculated with numerical models .
2. 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 .

no

1. The second verse expresses the reason for the first verse : the goodness of the Lord has been experienced in the past , and his faithfulness will last forever .
2. The second verse expresses the reason for the first verse : the goodness of the Lord has been experienced in the past , and his faithfulness will exist forever .

yes

1. At this point we can either integrate first , or we can change the integrands directly and continue from there .
2. At this point we can either integrate first , or we can directly change the integrand to and continue from there .
yes