Acipenserine
鲟精蛋白
🗣️ 情景例句
In addition, it's great exercise too, since we do a lot of hiking.
还有，那也是个好的运动，因为我们要长距离徒步旅行。
What shall I send him for his Christmas?
我要送他什么东西作为圣诞礼物？
He will be away for two months.
他要离开两个月，