adj.(像)浆液的，血浆(般)的，血清的，如水的

The patient's condition is quite serious, and we need to act promptly.
这位病人的病情相当严重，我们需要立即采取行动。
She gave a very serious response to the news.
她对这个消息给出了非常严肃的回应。
His injury was a severe one, requiring surgery.
他的伤势很严重，需要动手术。
The government has issued a stern warning against illegal logging.
政府对非法伐木发出了严厉警告。
The professor's lecture was filled with solemnity and wisdom.
教授的讲座充满了庄重和智慧。
The company took the issue of data privacy very seriously.
公司对数据隐私问题非常重视。
A serious mistake was made during the experiment.
实验中犯了一个严重的错误。
The artist treated her work with a serious and contemplative attitude.
艺术家对待她的作品有着严肃和深思熟虑的态度。
The atmosphere at the meeting was serious and professional.
会议的气氛严肃而专业。
He had a deep and serious conversation with his son about life choices.
他与儿子进行了深入而严肃的关于人生选择的对话。