1.And mathematically, you can express that in terms of how much that object subtends.

从数学 上讲，您可以用该向的程来表达这一点。

2.An object is said to subtend a certain angle of your vision based on how close you are to it, and how big it is.

根据您 与它的接近程以及它的大小，据说一个物体着您的视野的某个角。

3.So if you look at our tiny leaf, it may subtend only two degrees of your vision when it’s at your near point – say, 25 centimeters away.

所以果你看着我们的小叶子，当它在你的近点——比 25 厘米远——时，它可能只着你两的视线。机翻

4.The original subtended angle is the subtended angle of the unaided eye – the angle between the center of the objective lens and the height of the real image.

原角是肉眼的角——物镜中心与实的夹角。机翻

5.But when you look at the leaf through the lens, the virtual image is larger than the actual object, so it subtends six degrees of your vision.

但是当你通过镜头看树叶时 ，虚比实际物体大， 所以它着你的视线六。

6.In order to find the magnifying power of the lens, you just divide the angle subtended by the virtual image by the angle subtended by your unaided eye.

为了求出镜片的放大倍率 ，只需用虚 角除以肉眼角。

7.So if you look at our tiny leaf, it may subtend only two degrees of your vision when it's at your near point – say, 25 centimeters away. .

因此，果您看我们的小叶子， 当它在您的近点（例 25 厘米远）时，它可能只着您的视线的两。

8.We have the magnification equation, expressed in terms of subtended angles, but we can still use the equations in terms of distance and height for both objects and images.

我们有放大方程， 用角表示，但我们仍然可以使用物体和图的距离和方程。机翻

9.And the newly subtended angle is the amount that the object subtends when viewed through the eyepiece – the angle between your eye and the rays from the eyepiece.

新的向角是通过目镜观察物体时的向量——你的眼睛与目镜发出的光线之间的角。机翻

10.For example, if you’re looking up at the moon, and you cover it with your thumb, then your thumb and the moon are both subtending the same angle to your eye, which we measure in degrees.

例，果您正在抬头看月亮，并用拇指遮住它，那么您的拇指和月亮都会与您的眼睛形成相同的角，我们以为单位进行测量。机翻

11.For example, if you're looking up at the moon, and you cover it with your thumb, then your thumb and the moon are both subtending the same angle to your eye, which we measure in degrees.

例，果你抬头看着月亮，然后用拇指遮住它，那么你的拇指和月亮都着你的眼睛，我们用数来衡量这个角。