一定有很强的动机
“he must have a strong motive for turning himself in.”
THE DIALOGUE REEL
他能主动投案
“he must have a strong motive for turning himself in.”
一定有很强的动机
“he must have a strong motive for turning himself in.”
对于这些人来说
“For these people, the most important one has always been Meng Guangcai.”
“Don't take this surrender at face value; he's playing an angle.”
In Chinese legal psychology, abnormal actions like sudden self-surrender (主动投案) are scrutinized intensely for ulterior motives, such as shielding a mastermind or cutting a deal.
LEARNING CHUNKS & PARTICLES
there definitely is / there must be
An assertive deduction marker used when the speaker is confident in their logical inference.
a strong motive
A common formal/semi-formal collocation used in analytical and investigative contexts.