Sargassan
马尾藻多糖
🗣️ 情景例句
I think I'm quite proficient in both written and spoken English.
我认为我在英语读写方面相当熟练。
I think you have very attractive children.
我认为你有很吸引人的孩子。
There is a picture on the wall.
墙上有一张画。