🧩 词语组成解析
a. 聚乙烯基的
n. 甲醛\\n[化] 甲醛
🗣️ 情景例句
Hello, my name is ... May I speak to ...?
喂， 我叫……我可以和……讲话吗？
Hardships never come alone.
祸不单行。
It was mailed last week.
上个礼拜我们还没收到。