Use "snowball|snowballs" in a sentence

1. As Joseph Badaracco points out in his book, Leading Quietly, An Unorthodox Guide to Doing the Right Thing, "Sometimes small efforts are snowballs that roll down hills and accumulate force.

Comme le souligne Joseph Badaracco dans son livre intitulé Leading Quietly, An Unorthodox Guide to Doing the Right Thing, [traduction] « Quelquefois les petits efforts font boule de neige.

2. During a snowball Earth, iridium would accumulate on the ice sheets, and when the ice melted the resulting layer of sediment would be rich in iridium.

Durant une période de Terre boule de neige, l'iridium s'accumulerait sur les glaces, donnant une couche de sédiments enrichis en iridium lorsque celles-ci fondraient.