查询词典 concave function

There is a small bulb placed at focus of a concave mirror.

可改成 凹面镜焦点处有一个小灯泡。

Large concave mirror produces image that is magnified by the eyepiece .

由目镜产生放大图像的大的凹透镜。

By a concave spherical mirror and the mirror curvature center is located in a very close parallel plate of non-spherical corrections boards.

由一个凹球面反射镜和位于反射镜曲率中心的一块很接近平行平板的非球面改正板组成。

Cool Earth's insight was that if you coat only one half of a balloon, leaving the other transparent, the inner surface of the coated half will act as a concave mirror.

凉爽地球公司的设想是，如果你只镀气球的半面，保持另一半是透明的，有镀层的一半的内表面将起到一个凹透镜的作用。

Act as a concave mirror. Put a solar cell at the focus of that mirror and you have an inexpensive solar-energy collector.

把太阳能电池放在那个镜子的焦点上，你就有了一个便宜的太阳能收集器。

The beam sizes reflected from the concave mirror and the plane mirror are 48 mm and 5.1 mm,respectively.

得到由凹面镜和平面镜反射回来的光斑直径分别为4.8 mm和5.1 mm，平凹腔的角度对准精度达到了3.18′。

Aberration of the concave mirror is reduced by a meniscus lens.

用半月板镜头减少凹透镜的过失。

Others began considering the virtues of a concave paraboloidal mirror as primary receptor: it had been known since Antiquity that such a mirror would bring parallel incident rays to a focus at one point.

其他人开始考虑的美德，凹抛物面反射镜作为主要受体：它已被称为自古以来这样的一面镜子，会带来平行事件射线的焦点在1点。

As early as 400 BC for many years, China's "Mojing" documented book on the forward line of light, light reflection, as well as the plane mirror, concave mirror, convex imaging phenomenon.

早在公元前四百多年，我国的《墨经》一书就详细记载了光的直线前进、光的反射，以及平面镜、凹面镜、凸面镜的成像现象。

The best match between the rear shapes and support patterns is suggested. The rear 3-point support pattern of concave primary mirror is computed for its deformation under various working condition and the best support position is found out.

找到了主镜的背部形状与其支撑方式间的最佳配合关系；对双凹形主镜的背部三点支撑方式进行分析计算，找到了它的最优支撑位置。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。