Umbilic
a. 脐带的, 中心的
🗣️ 情景例句
I don't know what-to do.
我不知道怎么做。
That important man is very unassuming in his manner.
那个要人彬彬有礼，是一位毫不摆架子的人。
She stamped out the letters 'SOS' in the snow.
她在雪地上踩出了“SOS”这3个字母。