Quadravalence
四价
🗣️ 情景例句
Hello, it's good to see you again.
很高兴又见到你。
We are thinking of placing an order for your Flying Pigeon Brand bicycles. We would be very grateful if you could make us an offer for 200 ones with details.
我们正打算订购你方的飞鸽牌自行车。如果你们能给我们（购买200台的详细报盘将不胜感激。
He acted as if he had never lived in England before.
他的举动就好像他从未在英国生活过一样。