Dihydrouracil
二氢尿嘧啶
🗣️ 情景例句
Then you're not upset
那么 ，你没有感到不快
Wherever you go you'll meet a friend.
不管你到哪里，你总会遇到一个朋友。
He was just falling asleep when there was a loud knock at the door.
他刚要入睡，就有人很响地敲门。