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
Nixon also used chopsticks at the welcoming banquet in his honor.
尼克松在为其到来而举办的欢迎宴会上也使用了筷子。
To read a book
读书
It is now being sent to his home by train.
现在正用火车给他运回家来。