Specifically where are the troublespots or what are the system troubles?
具体来说，故障点在何处，或者什么是系统故障？
2
They were not just looking for bottlenecks—troublespots that regular commuters may know only too well.
他们不仅仅寻找交通瓶颈——那些上班族往往熟悉的不能再熟悉的拥堵点。
3
Software inspections: Peer review inspections to uncover defects, inconsistencies, and troublespots in products that might affect quality and performance.