The cloven hooves are sharp edged , elastic and concave.蹄锋利,呈凹形, 富有弹性.In adults its contour may be straight, slightly concave or slightly convex.成人肺其形状可以是直的, 轻微凹下或轻度突出.concave lens凹透镜The palm of one's hand is slight...
他为裁军运动和反对核武器扩散而奔走。He campaigned for peace and against the spread of nuclear weapons.要说服超级大国裁军是很难的.It is difficult to persuade the superpowers to disarm.大会通过了一项裁军决议.The session adopted a resolution on disarmament....