Be useful at
熟悉,精通,擅長…
?? 詞語組成解析
be
[bi]
v. 是;有，存在;做，成為;發生;
aux. 用來表示某人或某物即主語本身，用來表示某人或某物屬于某一群體或有某種性質;
at
[?t]
prep. （表示位置）在;在（某時間或時刻）;以，達; 向，朝;
n. 阿特（老撾輔幣單位，100 阿特 = 1 基普）;
??? 情景例句
What did you mean by well ...?
你說 嗯…… 的意思是什么？
How much does it cost to go there by ship?
坐船到那里要花多少錢？
Have you ever put your trousers in the washing machine and then remembered there was a large bank note in your back pocket?
你有沒有把褲子塞洗衣機，然后又想在褲子的后兜有一張大面值的紙幣？