Diacoustics
[醫(yī)] 折聲學
??? 情景例句
There's still an outside chance that he'll make it into the finals.
他打入決賽還有一線希望。
What can it be?
它是什么呢？
These satellites go round the earth and help us to learn more about the earth, the weather and other things.
這些衛(wèi)星繞著地球轉(zhuǎn)，幫助我們更好地了解地球、天氣和其他情況。