在前人对洋葱泥红变的研究基础上，研究了蒜泥绿变的机理。

Mechanism of greening of garlic purees was studied in the article, based on the previous studies of reddening of onion bulb purees.

youdao

我爱抬头望着树叶，看它们从绿变红，再由红变黄，接着变成棕色。

I like to look up at the leaves changing colors from green to red and yellow, and then brown.

youdao

红海滩四月初为嫩红，渐次转深，十月由红变紫，最佳观赏时间为五月至十月。

In the early of April, Hong HaiTan is soft red, then deeply until turn purple in October. The best season for you to come here is from May to October.

youdao

So, you get a rash, or a redness of the skin.

所以,你会出皮疹,或者皮肤变红

耶鲁公开课 - 生物医学工程探索课程节选