Bromoacetophenone
溴苯乙酮
🗣️ 情景例句
How many courses are you taking this semester?
这学期你选了多少课？
Without method, little can be done to any good purpose.
不讲究方法，办事就没有成效。
Whatever the source of noise, one thing is certain: silence, it seems, has become a golden memory.
看来寂静已变成一种珍贵的回忆。