Polyacetal
[化] 聚缩醛
🗣️ 情景例句
What did you bring?
你带的什么带子？
Mr. Jones is a renowned international authority on the problem of overpopulation in developing countries.
琼斯先生在发展中国家人口过剩问题方面是声誉卓著的国际权威。
Three pounds fifty pence,please.
请付3英镑50便士。