Aerotex
甲醛, 三嗪聚合物
🗣️ 情景例句
If you don't go to college, you'll never get a good job.
你要是不上大学，就永远找不到好工作。
What's your nationality?Are you a Japanese?
你的国籍是什么？你是日本人？
Are you in Row 4?
你是在第四排吗？