Pbt
[化] 聚对苯二甲酸丁二酯
🗣️ 情景例句
There is an emergency. Please send a fire engine.
这有火灾，请尽快派消防车来。
You are still thinking about a Ph.D., aren't you?
你还是想学成博士，是吗？
Hello, Jim! How are you?
吉姆，你好吗？