原来的锅炉开始往外喷火苗后他便换了个新的。He replaced the boiler when the last one began to spout flames.绝大多数锅炉有15至20年的使用期限。Most boilers have a lifespan of 15 to 20 years.她把炉灰从锅炉里面耙了出来。She raked out the ashes from the boiler....
It is this male - leaving behavior that highlights the matriarch elephant family.这种“走婚”行为形成了母系族大象家族的特点.When the bull elephant desires sexual activity , he approaches the matriarch - led herd.当公象发情时, 接近母象群.Robyn Erbesfiel...