e crucial to 和 be crucial for 都是正确的哦
不过稍微在意思上有区别：
1.be crucial to
1）be crucial to… 对…至关重要
2）be crucial to sb 对某人至关重要
如：A growing economy and a focus on essential priorities will also be crucial to the future of Social Security .经济发展和重点集中也对社会福利保险的未来至关重要.
2 be crucial for sth 对某事来说至关重要（不可以对人哦）
如：This year will be crucial for efforts to attain this goal .今年是实现这个目标的关键一年.