Masteries
n. 精通, 熟練（mastery的復數形式）
??? 情景例句
And we brought someone along who can help.
而且我們帶來了能幫助我們的人。
What are you doing?
你在干什么？
Our climate is not very good,but it's certainly interesting.
雖然我們國家的氣候并不很好，但又確實很有意思。