Mesoxyalyurea
四氧嘧啶
🗣️ 情景例句
Remember that wonderful little balcony
还记得那个美妙小阳台，
He that hath a full purse never wanted a friend.
金钱满袋，朋友盈门；钱袋装得饱，朋友不会少。
Fortunately, however, ancient men made tools of stone, especially flint,
然而， 幸运的是，远古人用石头制作了工具，特别是用燧石，