Be proficient at
精通于
🧩 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
What a pity! We have another party that day.
太可惜了，我们那天也有个聚会。
Although men are very different, often they have the same feelings.
人们虽然各自迥然不同，但是都具有相同的感情。
Jim ! Jim ! It's time to get up !
吉姆，吉姆，该起床了！