Phthaline
二R甲基苯甲酸
🗣️ 情景例句
How do you know so much about fishing?
你对钓鱼怎么知道这么多？
What time is it?
几点钟了？
That's a big box. Is it heavy? Please let me help you.
这是个大盒子。重吗？让我来帮你。