When our engineering colleagues do this between two flat surfaces say of ceramic or porcelain.

我的两个工程学的同事用两个瓷质的平面模仿了这个过程。

Facets are the flat surfaces of a cut gem.

刻面指的是被切割的宝石的平面。

Before they always had the safest bet, a nice flat surface.

而在这之前他们一直用的是最保险的选择——一个漂亮的平整面。

They build their nests on flat surfaces of the canyon walls.

他们在峡谷壁的平坦面上筑巢。

The past flights have been carried out over mostly flat surfaces.

过去的飞行大多是在平坦的地面上进行的。

Lie on your back on a flat surface, keeping your legs straight.

仰面平躺，双腿伸直。

The long flat surfaces are remarkably smooth and still have a glossy, mirror-like sheen.

长而平坦的表面极为光滑，仍旧发出镜面般的光泽。

For this one you have to lie on your back on a completely flat surface.

这一步，你仰面躺在一个平面上。

It has shown that it can travel at around 12mph (19kph) across a flat surface.

结果显示它能以每小时12英里（即每小时19公里）左右的速度通过平坦路面。

The app works best when your phone is resting on a flat surface, like a table.

当你的手机放置在桌子等平面时最管用。

First tip, we want to make sure you're carving your pumpkin on a firm flat surface.

首先，要确保你是在一个坚固的平面上雕刻南瓜。

They chose the correct photograph by breaking an infrared beam near the flat surface showing the photo.

它们可以通过感应屏幕上显示的红外光束来选择名人的照片。

Less energy was required in tests involving flat surfaces as well as on hills, the study found.

研究发现，无论是在平地还是山区测试，该设备都能降低所需能量。

Sit down on a flat surface, bend your legs, and make your feet touch each other.

坐在平面上，弯曲双腿，使两脚掌并拢。

It is a small device that you move around on a flat surface in front of a computer.

而是可在电脑前平坦平面上移动的小装置。

Previous techniques exist to solve this problem, but they take extremely long and are typically limited to flat surfaces.

之前也有技术能解决这个问题，但要花费相当长的时间，而且通常仅限于光滑的表面。

It can be set up on any flat surface, hung from a ceiling or perched atop a glass bottle.

它可以安装在任何平面上, 甚至可以挂在天花板或放在一个玻璃瓶子上。

Now there is a difference here when we're referring to the flat surface and the region or the area.

那么当我们指平面和指区域或地区时，是有区别的。

To see if you do, put your hand down on a flat surface and touch your pinkie to your thumb.

试一试，如果你将手放在一处平面上，用你的大拇指触摸小指。

You have a flat surface and you're referring to the position of something or someone in relation to that surface.

你有一个平面，你指的是跟这个平面相关的某物或某人的位置。