Otters are believed to have been on Earth for 90 million years.水獺被認為存活在地球上已經9千多萬年.Long - tail Weasels have long slender bodies. They are related to minks and otters.長尾鼬鼠有著細長苗條的身體. 他們和水貂、水獺是同種的動物.An attempt is being made ...
Wet ball mill smashes materials mainly through grinding instead of impacting.濕式球磨機對物料的粉碎主要靠研磨而不是沖擊.A car will come to a grinding halt if you put water in the petrol tank.如果把水灌進油箱，汽車會猛然間停下來。And increasing numbers of them ...