Definition: used for saying what the most important issue is in a situation Level: C1
需要有人在这里——关键在于谁是最合适的人选。
Someone needs to be here - it ___is ___a ___question ___of who would be the best person.
这个选择本质上是一个价格问题。
The choice ___is ___a ___question ___of price.
对于这个项目，成功与否关键在于妥善的规划和执行。
For the project, success ___is ___a ___question ___of proper planning and execution.
