Something as simple as toothpaste has at least three chemicals that keep your teeth clean.
哪怕像牙膏这种简单的东西也至少有三种化学成分来保持牙齿清洁。
2
Even today when Will thinks that he won't be able to do something, he will look back to this experience and keep telling himself, "one brick at a time".
即使在今天，当威尔认为自己做不到一件事时，他会回顾这段经历，并不断告诉自己：“一次添一块砖”。
3
Couldn't I just line the perimeter of my yard with something to keep them at bay?