Lactobacillin
乳酸杆菌素
🗣️ 情景例句
You don't know what you are talking about.
你不知道你在说什么。
I'm fishing at the lake.
我在湖边钓鱼。
This machine joins the metal pieces together, he said.
“这台机器把金属片焊接起来，”他说