Be useful at
熟悉,精通,擅长…
🧩 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;
at
[æt]
prep. （表示位置）在;在（某时间或时刻）;以，达; 向，朝;
n. 阿特（老挝辅币单位，100 阿特 = 1 基普）;
🗣️ 情景例句
Let's see some action!
赶快行动起来吧！
The lawyer asked for mercy from the court for his client.
律师为他的当事人向法庭提出酌情赦免。
He earned enormous sums of money and was paid as much as
100 for a single appearance.