Harmonic mean
[經(jīng)] 調(diào)和平均數(shù)
?? 詞語組成解析
harmonic
[hɑ:'m?nik]
adj. [樂]和聲的，悅耳的;[物]諧波的;和睦的，融洽的;[數(shù)]調(diào)和的;
n. [物] 諧波;[樂]泛音，和聲;[數(shù)]諧函數(shù)，調(diào)和函數(shù);
mean
[min]
v. 表示…的意思;意思是;打算;產(chǎn)生…結(jié)果;
adj. 吝嗇的;刻薄的;破舊的;殘忍的;
n. 平均數(shù);中間;幾何平均;等比中數(shù);
??? 情景例句
What made you pick this job?
你為什么選擇這個工作？
Why are you talking so far?
你為什么說得這樣快？
No, Mrs Brown. Your son's trouble is very common these days. It happens all the time. It comes and goes very quickly. He'll get well soon.
是的，布朗太太。你兒子的毛病現(xiàn)在是極常見的，經(jīng)常有的。它來得快，去得也快。他不久就會好的。