2006年起, 英语口语对话我们的营业额逐年增加。
start at six months with small amounts of foods and increase gradually as the child gets older;婴儿满6个月开始添加少量食物并随着年龄的增长逐渐增加食物的种类;
As the products of dry ice sublimation layer upon layer from top to bottom, the resistance increase gradually.随着制品自上而下层层干燥,冰层升华的阻力逐渐增大。