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)
someone who complains or cries easily
to increase speed
to generate excitement and talk about a product or event
to gain someone's trust through actions or reliability
decisions made based on factual data rather than assumptions
to study intensely
