Quadrol
乙二胺
🗣️ 情景例句
The news was announced to the public on TV.
这则消息经由电视向大众宣布。
The finest diamond must be cut.
玉不琢不成器。
some drifting and slow, others jerky and rapid.
这些活动有的飘忽而缓慢，有的急剧而快速。