Protogen
硫辛酸
🗣️ 情景例句
The village was filled with people--the weather was so nice.
镇上挤满了人--因为天气好的缘故。
He applied for a scholarship at Harvard University.
他申请了哈佛的奖学金。
Because I've just retired.I want to buy a small house in the country.
因为我刚退休。我想在乡下买幢小房子。