Hexamethylated
[医] 六甲基的
🗣️ 情景例句
Is this your first trip to China?
这是你第一次到中国吗？
He is a good friend that speaks well of us behind our backs.
背后说人好话的够朋友。
As long as all was still, the pen drew a straight line,
只要一切都是静止的，笔就会划出一条直线；