Pbt
[化] 聚对苯二甲酸丁二酯
🗣️ 情景例句
Betty, you had it, but you didn't say it.
Betty你知道答案， 但是你没有说出来。
He has graciously consented to speak to us on that subject tonight.
他同意今晚他将就这一专题演讲。
With the invention of writing, a great advance was made, for knowledge could then be not only communicated but also stored.
随着书写的发明，又迈进了一大步，因为这样一来，知识不仅能交流，而且能储存了。