Sera
浆液, 血清\\n[医] 血清; 浆液
🗣️ 情景例句
He had an emergency.
他有紧急事情。
Better wear out shoes than sheets.
宁可（经常运动）穿破鞋子，也不（因病长卧）磨破床单。
If you order in large lots, we'll reduce the price.
如果你大量订购，我们可以降价