These B12 Foods For Vegans Offer Surprising Benefits For Your Brain
"those / these" are determiners and are used before nouns to refer to a particular group of things / people, e.g. these people / those rules / those buildings. Update: 题主问的是What are those? 然后他.
6 major benefits of vitamin b12 for vegans in 2025 | Vitamin b12, Vegan ...
