Chinazoline
[化] 喹唑啉
??? 情景例句
Got it!
找到了！
I'm afraid you will be too tired
我怕你會太疲倦。
Historians have long been puzzled by dots, lines and symbols which have been engraved on walls, bones, and the ivory tusks of mammoths.
長期以來，歷史學家一直對雕刻在墻壁上、骨頭上、古代長毛象的象牙上的點、線和形形色色的符號感到困惑不解。