Exacerbation
n. 恶化, 增剧, 激怒\\n[医] 加重, 转剧
✅ 同义词
📖 牛津释义
exacerbation
n[U].
🗣️ 情景例句
or the subway ...
或者搭地铁……
Then, all of a sudden, it became cloudy and began to rain.
可是突然天就变了，乌云密布并下起雨来。
the necessary method of study is to group the relevant material and to take note of all possible variant forms and conditions.
应采取的研究方法是，把有关各方面的材料汇集起来，同时注意任何可能出现的异常情况和条件。