o The frequency, wave length and speed of sound are closely related 声音的频率、波长和速度三者是密切相关的。 Compared with mine your computer is really cheap and fine 与我的电脑相比,你的电脑真是物美价廉。⚫ The frequency, wave length and speed of sound are closely related. 声音的频率、波长和速度三者是密切相关的。 Compared with mine, your computer is really cheap and fine. 与我的电脑相比，你的电脑真是物美价廉