The team members each have their own strengths, which complement each other.
Tips
history
From the 《管子·形势解》: wise rulers assign officials by 'what they excel at, not what they are weak at' - for all things 'each has its own long and short'. The idiom packages that Warring-States management principle.
mistakes
长 here reads cháng ('strong point; excellence'), not zhǎng ('to grow'). Same character, two readings - context is the only cue.
