Boroxin
環硼氧烷
??? 情景例句
Eight o'clock is fine.
八點鐘可以。
I want a cup of coffee.
我想要一杯咖啡。
So the number of stars that we know exist is now estimated at about 300 million million million.
因此，我們所知道的現有恒星數目估計約有30億×1000億顆。