Internal arithmetic
[计] 内部运算
🧩 词语组成解析
internal
[ɪn'tɝnl]
adj. 国内的;内部的;体内的;内心的;
prep. （机构）内部的;
n. 内脏，内部器官;本质，本性;
intern=inter 在…之内 + al 属于...的 → a.内的；国内的
🗣️ 情景例句
And if it's successful,
假如成功的话，
They are so busy these days, that they don't even have time for their friends.
他们最近忙得没法和朋友见面。
That's worthwhile.
那是值得的。