Biosolids
n. 生物固体（从处理过废水中取得的固体或半固体材料, 常用作肥料）
🗣️ 情景例句
I hear the exams will be very tough.
我听说考试挺难的。
John has extracurricular activities. He's on the football team.
约翰有课外活动。 他参加了足球队。
I went downstairs and sat in front of the television pretending to read.
便来到楼下坐在电视机前假装看书。