Corasil
(液体色谱固定相)表面多孔的玻璃珠
🗣️ 情景例句
Excuse me. Is this seat taken?
对不起 ，请问这个座位有人吗？
No man knows when he shall die, although he knows he must die.
纵然知其难免一死，人却难料何时身亡。
I said I would be at your house at six o'clock, but the boss want me to do some extra work.
我说过我6点到你家，但老板要我加班。