The German space agency has supplied an experimental box containing fish, plants, worms, bacteria and even human cancer cells for a series of biological studies.
德国航天局提供了一个实验箱，包含有鱼类，植物，蠕虫，细菌，甚至人类癌细胞，以作一系列生物研究。
2
From German Christmas goose to "fur coat" fish, here are just some of the ways people celebrate Christmas around the world.