Acetyltryptophan
乙酰氨酸
🗣️ 情景例句
What was your speciality?
你学的是什么专业？
Not only did I forget my train ticket, but I also forgot my passport.
我不仅忘了带火车票，还忘了带护照。
They were also quite sure that a cigarette end did not start the fire.
他们还十分肯定火灾也不是由烟头引起的。