Lactamine
丙氨酸
🗣️ 情景例句
Philip had to go back to the hospital. Philip
必须要回医院。
He is very nervous, so he takes a lot of pills.
他非常的神经质，所以要服很多药
It was upon this principle that the first instruments were made,
据这一原理，制造出了最初的地震仪器，