?? 詞語組成解析
math
[m?θ]
n. 數學（等于mathematics）;
??? 情景例句
You probably heard about it. We have private teachers in our holiday.
或許你已經聽說過。我們交大的學生在假期間做家教。
How often did I tell you not to speak so loud?
我告訴你多少次不要講話這么大聲?
The letter x stands for an unknown number.
字母x代表未知數。