Pentoxide
n. [化]五氧化物
🗣️ 情景例句
Hello.
好。
We would be glad to start business with you.
我们很高兴能与贵公司建立贸易往来。
It's always warm in April and May,but it rains sometimes.
4月和5月的天气总暖洋洋的，但有时下雨。