Be indispensible to
对...必不可少, 对...是必需的
🧩 词语组成解析
be
[bi]
v. 是;有，存在;做，成为;发生;
aux. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质;
不可或缺
to
[tu,tə]
prep. 向，朝着;到;关于;属于;
adv. 朝一个方向的;到某种状态;关闭;
🗣️ 情景例句
Kids today have too much freedom, it's not like the old days.
现在的小孩太自由了，不像以前。
He's a student.
他是学生。
the king himself set out to penetrate the camp of Guthrum, the commander of the Danish invaders.
他亲自潜入丹麦入侵司令官古瑟罗姆的营地。