Phosphatidalcholine
缩醛磷脂酰胆碱
🗣️ 情景例句
Good. Can we sign them right away?
好的。我们现在可以签合同了吗？
As you all know, doing business is not an easy thing to do.
大家都知道，做生意并不是一件容易的事。
You can see shapes on the rock. Do you see that bit?
“你可以看见岩石上的形状。你看见那一小块了没有？