The cerebrum has right and left halves, called hemispheres, which are connected in the middle by a band of nerve fibers (the corpus collosum) that enables the two sides to communicate.

大脑有左右两侧，称为 脑半球 ，由一带状纤维（ 胼胝体 ）在中间连结，从而使得两个脑半球能够互相通信。

youdao

Image: patterns of air movement caused by a flying locust (middle and right columns) are similar to air patterns predicted by a computer simulation (left column).

图片说明：飞行蝗虫引起的空气流动模式(中间一列和右面一列)与计算机仿真预言的空气模式(左面一列)是相似的。

youdao

Its simple workflow has three parts: an application provider (left), an application distributor (middle), and users (right).

它的简单工作流程有三个部分：一个应用程序提供者(application provider)(左边)，一个应用程序分发者(application distributor)(中间)和用户(user)(右边)。

youdao

Spain ,with its cachet of international stars, tried everything in its bag of tricks, attacking from the right,the left, and down the middle, but the Americans were a step quicker all night.

VOA: standard.2009.06.24

All of you chose Down, but Up does best against Left and Middle does best against Right.

你们都选择下,可是选上是左的最佳对策,而选中是右的最佳对策

耶鲁公开课 - 博弈论课程节选

He could kick the ball to the left, the middle, or the right.

他可以选择左路,中路,右路

耶鲁公开课 - 博弈论课程节选

Although Judith Martin, the doyen of etiquette, recommends using cutlery beginning on the far left or right and progressing toward the middle.

FORBES: Politically Correct Pizza Party

Just look realistically at the electorate, and not through the rose colored lenses of the party itself: Most American voters are in that soft middle, between the Right Center and Left Center.

FORBES: Perception of Republicans Fails To Reach Between the Lines

The people that count this time are not the 269 million Americans or even the 435 House members, but only the 30 or so moderate Republicans, all on the political version of the endangered-species list, who come from places where most people cling religiously to the radical middle and fear the intensity of right and left.

CNN: ASIANOW - TIME Asia