Anthracene
n. 蒽\\n[化] 蒽
🗣️ 情景例句
John is tied up at the present time.
John现在有事。
Did you hear that we would have a holiday next work?
你有没有听到下周可以休假的事？
The degree of secrecy naturally varies considerably.
保密程度自然差别很大。