to think about only one thing all the time
いつも一つのことしか考えない (itsumo hitotsu no koto shika kangaenai)
"He has a one-track mind when it comes to his business."
"彼はビジネスのことになるとワン・トラック・マインドを持っている。" (Kare wa bijinesu no koto ni naru to **wan torakku maindo o motte iru**)
to keep persevering and not give up
to be in serious trouble or difficulty
to go beyond the usual limits; to innovate
a small problem that is exaggerated
secretly; in a sneaky way
at the last possible moment; just before it’s too late
