Polyacetaldehyde
聚乙醛
🗣️ 情景例句
Would it be all right if I went with you?
我跟你去可以吗？
Mrs. Hughs, this is Peter Brown.
休斯太太，这是彼得i布郎。
Some of the things were hundreds of years old.
展出的一些东西已有数百年的历史了。