Transcobalamin
运钴胺素蛋白
🗣️ 情景例句
Sometimes he's very sad.
他有时很忧悒。
I used to wake up early and get up at 7 o'clock.
我过去常早醒来并且在7点钟起床。
He was smiling hopefully.
他满怀希望地微笑着。