Phytosphingosine
植物鞘氨醇, 4-羟双氢(神经)鞘氨醇
🗣️ 情景例句
I think Michelle is asleep now. Let's talk.
我想Michelle现在睡着了。让我们谈谈吧。
Step by step the ladder is ascended.
登梯需要逐级登。
Are there any boats in the picture?
画里面有船吗？