Sentence examples for both are obligatory from inspiring English sources

Both are obligatory, of course.

Using histology, molecular markers and analysis of Celsr1 and Vangl2 mouse mutants, we conclude that though both are obligatory for normal lung development, these proteins regulate some distinct steps in airway formation.

Indeed, the activities of ROS and JNK induced by death receptors appear to be linked, both being obligatory participants in the same death-inducing pathway triggered by these receptors [ 47, 48].

Both power and freshwater are obligatory for life and industry production.

We conclude that the neurons in the RTN region that have a history of both Phox2b and Atoh1 expression are obligatory elements of the circuitry for breathing regulation by CO2 in neonates.

Goosebumps are obligatory.

A cocktail umbrella and a garish stirrer are obligatory.

Lake swimming, barbecues and afternoon naps are obligatory.

All actions that are obligatory are of this sort.

These measures are obligatory for GM crop farmers.

Annual predictions by research and consulting organizations are obligatory.