Helicene
螺烯
🗣️ 情景例句
That's the deal.
这是交换条件。
Please sit down and have a glass of milk.
请坐下来喝一杯牛奶。
The river which forms the eastern boundary of our farm has always played an important part in our lives.
形成我们农场东部边界的一条河流一直在我们生活中发挥着重要作用。