billions of的音標(biāo)：...
Biological systems have been doing this for billions of years.生物系統(tǒng)億萬(wàn)年來(lái)一直都是這樣。Billions of pounds are riding on the outcome of the election.幾十億英鎊都取決于這次選舉的結(jié)果。Israel accepted billions of dollars in war reparations.以色列得到了幾十億美...