Tetronate
4-羟[基]乙酰乙酸内酯
🗣️ 情景例句
It is. That's why we bought it for you.
是的。这就是我们买给你的原因。
I will be moving to Montreal at this time tomorrow.
我将在明天这个时候搬到蒙特利尔。
I've never met him but I've talked to him on the net.
我没见过他，但我和他在网上聊过天。