necessary
🇺🇸
/ˈnesəseri/
🇬🇧
/ˈnesəsəri/
needed to achieve something
It is necessary to have a passport for international travel.
国际旅行必须持有护照。
cannot be avoided or changed
Making difficult choices is a necessary part of leadership.
做出艰难的选择是领导力中不可避免的一部分。