Bombycin
蚕素
🗣️ 情景例句
First, we have to decide where to live.
首先 ，我们得决定住在哪里。
My uncle was a pilot with the airlines.He just retired.
我的叔叔是航空公司的一名飞行员，他刚退休了。
I have some difficulty in pronouncing some of the words in English.
我有些英语单词发音不好。