冻伤是危险的,一般发生在皮肤长期暴露在极冷的环境.Frostbite is damage that happens when skin is exposed to extreme cold for too long.毛猛犸(长毛象)就生活在西伯利亚极冷的环境下.For example the hardy woolly mammoths lived in the extreme cold of Siberia....
It only takes a few days for beans to sprout.豆子只要几天就能发芽。When you sprout seeds their nutritional content increases.让种子发芽后，其营养含量会提高。When the seedlings sprout, uncover the tray.秧苗发芽后，就把盘子上的盖子拿掉。...