Phosphocholine
胆碱磷酸
🗣️ 情景例句
OK. Let me repeat it.
好吧。让我重复一遍。
How much is a hair cut?
剪一次头发要多少钱？
No. The next development was to carve the characters on a piece of wood.
是的，不象。下一步的发展是将汉字刻在一片木板上。