Combine in example sentence
The ingredients are there, we just don't know how they combine to create life, and presumably there will be worlds on which life doesn't start.
More example sentences with word combine
And what starts happening is that, around young suns, young stars, all these elements combine, they swirl around, the energy of the star stirs them around, they form particles, they form snowflakes, they form little dust motes, they form rocks, they form asteroids, and eventually, they form planets and moons. 
