to start something from the very beginning
从头开始做某事 (cong tou kaishi zuo mou shi)
"They built their business from the ground up with no investors."
"他们从头开始建立了他们的生意，没有投资者。" (Tamen cong tou kaishi jianli le tamen de shengyi, mei you touzizhe)
A silly or foolish person.
taking advantage of a current trend or success
a group that works efficiently and smoothly together
to work hard and focus on something
to end a romantic relationship suddenly or unkindly
extremely bored
