Quadrine
[化] α-氨基丁酸; α-氨基正丁酸
🗣️ 情景例句
Help me get this stuff out of the car.
帮我将这些东西拿下车子。
I tried several times to call, but there is no answer.
我打了几次，但是没有人回答。
Which do you prefer, horse riding or shooting?
你比较喜欢哪一种呢，骑马还是射击？