to think about only one thing all the time
一直只想一件事 (yīzhí zhǐ xiǎng yī jiàn shì)
"He has a one-track mind when it comes to his business."
"当涉及到他的生意时，他有单一思维。" (Dāng shèjí dào tā de shēngyì shí, tā **yǒu dān yī sīwéi**.)
to focus all attention and effort on achieving something
to take on a task that is too big to handle
to thoroughly investigate or explore something
an important or influential person
someone or something that brings happiness
to generate excitement and talk about a product or event
