Immunostain
n. 免疫标记
🗣️ 情景例句
Did you get a chance to get outside at all?
有时间出门吗？
He has been to America.
他曾去过美国。[表示曾经有过的经验]
like the cooling of a hot kettle or the wearing-out of a pair of shoes.
就像一壶热水迟早会凉下来，一双鞋渐渐会磨破一样。