Phytosphingosine
植物鞘氨醇, 4-羟双氢(神经)鞘氨醇
🗣️ 情景例句
Grandpa taught me.
爷爷教我的。
His bad English is a bar to his getting a job.
他的英语很差，这是他找工作的一个障碍。
I'll get back to you as soon as I can.
我会尽快给你回音。