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
Actually, it's the only newspaper.
事实上， 它是唯一的报纸。
The years teach much which the days never know.
学问集年而成，而每日不自知也。
Then he remembered his comrade downstairs.
然后他想起楼下的同志。