我相信你们可以想象如果你,需要把一个蛋白质标记成绿色,一个标记红色，一个标记黄色，这样你就可以研究非常复杂的生物学过程。

And I'm sure you can imagine that if you want to label onw protein green and one red and one yellow, now you can start looking at really complex biological processes.

youdao

我也化装成一个乞丐，挨家挨户去乞讨，谁给我肉吃，我就在他家的门上划一个红色标记，这样侍卫就能抓到他。

I'll now disguise myself and go around to the houses begging. If anybody gives me meat, I'll make a red mark on the front door, and your guards can go and arrest the thieves.

youdao