Vanillin test
[医] 香草醛试验(检吲哚)
🧩 词语组成解析
n. [化]香草醛,香兰素
🗣️ 情景例句
John is tied up at the present time.
John现在有事。
On the morning of the next day he went to New York.
第二天早晨，他去了纽约。
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。