鱼的腹鳍a fish's ventral fin腹鳍 对应着四足动物的后肢.Ventral ( or pelvic ) fins correspond to the hind limbs of a quadruped.这快速流动的气流为腹鳍提供了额外的升力.This faster - moving air provides the pelvic fin with additional lift....
Their imaginations are quite something for 2 yr olds.对两岁的小孩子来说，他们的想象力非同一般。Scientists have more to do than to allow their imaginations to roam at large.科学家在任其想象力自由遨游之外还有更多的事情要做.Imaginations bodies forth the forms of thing...
The carts were pulled by bullocks.货车由阉公牛拖着.Before the battle, the commanders ordered the sacrifice of two bullocks to the god of war.打仗之前, 指挥官下令给战神供奉两只小公牛....
如果不加限制，城市往往会联合发展成越来越大的集合城市。Cities, if unrestricted, tend to coalesce into bigger and bigger conurbations.这种病如果不治疗可能会发展成慢性病。If left untreated the condition may become chronic.他在推动牙医学发展成一门独立学科的过程中发挥了重要作用.His work was impor...