Boron trichloride
[机] 三氯化硼
🧩 词语组成解析
boron
[['bɔ:rɔn]]
n. 硼\\n[化] 硼B
n. [化]三氯化物
🗣️ 情景例句
How did you do that?
你怎么做到的呢？
You can tell.
看得出来。
So the number of stars that we know exist is now estimated at about 300 million million million.
因此，我们所知道的现有恒星数目估计约有30亿×1000亿颗。