He didn't understand the concept of differential equations.
- Él no entendió el concepto de ecuaciones diferenciales.
How small is a differential? What's the smallest number greater than zero? What's twice that number?
- ¿Cómo de pequeño es un diferencial? ¿Cuál es menor número mayor que cero? ¿Cuánto es el doble de ese número?
This differential equation can be easily solved by Laplace transform.
- Esta equação diferencial pode ser facilmente resolvida por meio da transformada de Laplace.
He didn't understand the concept of differential equations.
- Ele não entendeu o conceito de equação diferencial.