Ppo
abbr. 聚对苯氧化物（poly - p - phenylene oxide）；胃蛋白酶最大排泄量（peak pepsin output）
🗣️ 情景例句
What are your weaknesses?
你的缺点是什么？
I don't know where I've seen him before.
我不晓得在哪儿见过他。
There's no need for that. We'll have dinner another time.
不必为那件事惭愧。我们改个时间再共进晚餐吧。