物体

现在从考察一无应力物体中的圆球形单元体开始讨论。

We begin by considering a spherical element in an unstressed body .

如果物体的角速度是改变的，就说这个物体具有角加速度。

If the angular velocity of a body changes , it is said to have an angular acceleration .

短声波即使遇到小物体都会产生回音。

Short sound waves bounce off even small objects .

月光下，我只能分辨出物体的轮廓。

By the light of the moon I could just make out shapes and outlines .

这种病症使患者难于看见视觉边缘的物体。

The condition makes it difficult for patients to see objects at the periphery of their vision .

X射线能够穿透很多物体。

X-rays can penetrate many objects

他认为婴儿几乎就是毫无生命的物体。

He thought of the baby almost as an inanimate object .

它们也可用于工厂车间，用来焊接物体。

They will also be used on factory floors to weld things together

任何有较强重力的物体都会对其他物体产生引力。

Anything with strong gravity attracts other things to it .

患健忘症的人不会忘记关于物体的一些基本知识。

People suffering from amnesia don 't forget their general knowledge of objects .

当巨大物体撞击地球时，就会产生凹坑。

When a large object impacts the Earth , it makes a crater .

你的两张照片拍的都是静止物体。

Both your pictures are of static subjects .

他眯起眼睛，就好像在端详地平线上的某一物体。

He squinted his eyes as though he were studying an object on the horizon .

这在物体的边缘形成了一道色谱，使图像变得模糊不清。

This creates a spectrum of colours at the edges of objects which blurs the image

标准尺寸的三脚架可能会不便于使用，用于拍摄低角度的物体时尤其如此。

Full-size tripods can be awkward , especially if you 're shooting a low-level subject .

将运动物体保持在画面的正中央似乎合乎逻辑。

It seems logical to keep a moving subject exactly in the middle of the picture .

空的物体会在水中浮起。

Empty things float .

物体的物理特征也应考虑进去。

The physical characteristics of objects should also be taken into account .

摩擦力作用于运动着的物体，并使其停止。

Friction acts on moving bodies and brings them to a stop .

物体下落增进动量。

A falling object gains momentum as it falls .

偏置的任何物体都不是垂直的。

Anything in a leaning position is not upright .

物体热则涨，冷则缩。

Objects expand when heated and contract when cooled .

物体受热则膨胀。

When matter is heated , it expands .

日落西山时，天空出现了一个移动的发亮物体。

A bright moving object appeared in the sky at sunset .

正像在暗场法中一样，相物体这时就可以看见了。

Just as in the dark-ground method phase objects are then perceptible .

地球引力使物体落到地面上。

The force of gravity makes things fall to earth .

物体燃烧需要一定的热度。

The burning of an object requires a certain degree of heat .

这物体已不再循环运动。

The object is no longer in cyclical motion .

霉蔓延得很快，有时会完全覆盖发霉物体的表面。

Mould spreads quickly and can cover something completely .

他的目光落在一个奇怪的物体上。

His eyes fell on a curious object .