All sounds are produced by vibrations; the sound of our voices is the result of vocal chords vibrating in our throats, while sound from a plucked guitar string comes from the vibrations of the string.
所有的声音都是通过振动发出；我们是通过喉咙中的声带振动而发出的，而弦拨吉他通过琴弦的振动发声。
We also need to improve the ventilation in our office to help prevent headaches, smells, sore throats, stuffiness and dustiness.
我们也需要改善办公场所的通风来预防头疼、不良的气味、嗓子疼、鼻塞和灰尘。
We dared not clear our throats in the presence of others for fear we would be accused of harboring the virus, whose first symptom was a dry, hacking cough.
我们甚至不敢当着别人的面清喉咙，因为这可能让别人误以为你已经被感染，而SARS的初期症状就是干咳。
We dared not clear our throats in the presence of others for fear we would be accused of harboring the virus, whose first symptom was a dry, hacking cough.
我们甚至不敢当着别人的面清喉咙，因为这可能让别人误以为你已经被感染，而SARS的初期症状就是干咳。
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