Antiguamente no emboquillaban los cigarrillos. Empezó a hacerse para limitar su toxicidad.In the old days, they did not tip cigarettes. They began to do so in order to limit their toxicity.
Al emboquillar un túnel, debe usarse la menor cantidad posible de explosivo para evitar corrimientos de tierras.When creating a tunnel by blasting a hole, the smallest possible amount of explosive should be used in order to avoid landslides.