This is the 7263rd most frequent Chinese word.
缺一不可
"Indispensable; every part is essential and none can be omitted."
The phrase "缺一不可" is used here to express that both personal ability and team spirit are essential and cannot be excluded for achieving project success.
团队合作是项目成功的关键，个人能力和团队精神缺一不可。
Team collaboration is crucial for project success; personal ability and team spirit are both indispensable.
In this context, "缺一不可" signifies that all aspects or parts of the plan are equally important and necessary, without any being superfluous.
制定一个完整的计划需要考虑多个方面，各个部分都缺一不可。
Creating a comprehensive plan requires consideration of multiple aspects; every part is indispensable.
Here "缺一不可" is used to illustrate that all primary ingredients are crucial to prepare the dish, emphasizing that none can be omitted.