Frustule
n. 硅藻细胞壳
🗣️ 情景例句
They are eager to learn English.
他们急着要学英语。
She is starting to work her way up in the company.
她在公司开始发挥实力了。
Was the noise a cause of the illness, or were the complaints about noise merely a symptom?
是噪音引起了（精神）病呢，还是（精神）病的症状之一是对噪音的抱怨？