Be busy doing
成人 Adult Edu忙于(做)...
🧩 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;
busy
['bɪzi]
adj. 忙碌的;占线;繁华的;爱管闲事的;
vt. 忙着做某事;使奔走;使经营;
n. 〈英俚〉侦探;包打听;
n. 行为, 活动
🗣️ 情景例句
As a matter of fact,
事实上，
That's the way I look at it, too.
我也是这么想的。
The explanation was simple but very unusual.
解释很简单，却异乎寻常。