穿过地理梯度, 莱文斯预料有分布区不重叠的小种或近群种.Across geographic gradients, Levins expects allopatric races or coenospecies exist.航空磁梯度仪在六十年代中期交付使用.The airborne magnetic gradiometer came into use in the middle 1960 s.这说明水动力条件具有很明显的位能梯度.Thi...
He was the smoothest and probably the most powerful chief of staff in political memory.在人们关于政治人物的记忆里，他是最精明、可能也是最有权势的参谋长。Arnold was the whitest and the smoothest man.阿诺德可是个最纯净--最有礼的人.Perhaps this is the smoothest and stea...
...a man of middling height.中等身材的男子So you're going to Paris? How's your French? Oh, fair to middling.这么说你打算去巴黎了? 你的法语怎样? 哦, 还马马虎虎吧.The meal is fair to middling.这餐饭菜还算过得去.The dinner was middling.饭菜还过得去.On that s...
He believes Santa Claus comes in through the chimney.他相信圣诞老人从烟囱进来.Santa Claus is the personification of Christmas.圣诞老人是圣诞节的象征.Bah! There is no Santa Claus.哼, 那里有什么圣诞老人!...