上下

The piston is essentially a cylindrical plug that moves up and down in the engine cylinder.

实质上活塞是一个在气缸中上下移动的圆筒状的塞子。

At the same time, the mark pin is vibrated up and down at the frequency of more than 200 per second by compressing air and make charaters and figures by continuous point lattice on the workpiece.

计算机控制步进电机使打印针按预定的字符或图形的轨迹移动，同时压缩空气使打印针以每秒200次以上的频率上下振动，在工件上打出由连续点阵构成的字符和图形。

In this important respect, the US and China are polar opposites on climate change.

在这个重要的问题上，美国和中国上下对气候变化的态度截然相反。

A few epidermal hairs distributed on the Costa of Lonicera Japonica Thumb. The upper epidermis of Solidago decurrens Lour were covered with sparse stellate hairs. The stomas distributed on the upper epidermis hairs of Lonicera Japonica Thunb, Lonicera confuse and Solidago decurrens Lour, which could reflect the sunlight and decrease the transpiration to adapt the highlight and drought environment;(2) The leaf blades of Polygala japonica butt were fleshy, and the sunk stomas distributed on both the sunk place of the upper epidermis and lower epidermis, which help to water conservation.

结果：(1)忍冬、华南忍冬、黄花草下表皮均分布浓密的表皮毛，忍冬上表面中脉有少量表皮毛，黄花草上表皮分布有稀疏的星状表皮毛，忍冬、华南忍冬和黄花草的气孔位于下表皮毛间隙，这种结构可反射阳光和阻止水分蒸发，从而适应强光和水分不足的环境；(2)瓜子金叶片为肉质叶，上下表面均有气孔分布，并出现明显的下陷。

There isn't maximum principle for polyharmonic equation,so this paper first established a super-sub-sulution theorem via low semi-continuity and changed assistant function.

因为多重调和方程没有极值原理，所以首先利用泛函弱半连续性和适当变换辅助函数的方法建立起多重调和方程的上下解定理。

As in m uscovite,offsets of adjacent (CO3) layers are similar to those in 2M2,which results in the layer-stacking polytype structure.

由于Ca层上下两边的CO3层的相对错动，形成了类似于2M2白云母的堆垛多型结构。

I've got more poof than he could ever have.

我一根手指的魔力比他全身上下加起来还多

But we can, t hope to make any positive progress in any direction without considering the welfare of the world as a whole.

如果这种预见正确的话，地球上下一个新的智能生命形式将是一种长着大头颅和不发达肌肉的类似人类的动物。

Selling guns is like selling vacuum cleaners; you make calls, pound the pavement, take orders.

贩卖枪械就像销售真空吸尘器一样，你拨打电话，以英镑在人行道上下订单。

CBD redefines objects in the context of a standardized infrastructure for interoperability frameworks for the construction and assembly of applications, and prebuilt components that subscribe to component infrastructures and frameworks.

cbd按编制和装配应用程序的互用性架构以及描述组件基础设施和架构的预制组件的标准化基础设施的上下关系，重新定义了对象。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。