Octanal
[机] 辛醛
🗣️ 情景例句
May I have a pillow and blanket, please?
能给我一个枕头和毛毯吗？
Is he coming to dinner?
他回来吃饭吗？
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，