Nicosode
烟酸
🗣️ 情景例句
Well, do you have the phone number there?
那么， 有那儿的电话号码吗？
Courtesy costs nothing.
谦虚恭敬，不用分文。
He marked all the bees that came to the nearby feeding place blue, and all the bees that went to the faraway place were marked red.
他把所有飞来近处喂食点的蜜蜂标上蓝色，飞往远处喂食点的蜜蜂标上红色。