视听教具

The Foundation publishes books on nearly every aspect of the field; learning modules (step-by-step instruction booklets); audiovisuals (CD-ROMs, videocassettes, slides, and audiocassettes); and research and technology reports.

基金会在该领域几乎每个方面都出版书籍，学习模块；视听教具（CD-ROM、录影带、幻灯片和录音带；还有研究和技术报告。

In audiovisual aids, a projector for displaying opaque subject matter on a screen, e.g.

在视听教具中，一种投影仪，用于在屏幕上显示不透明的内容，如书页。

In audiovisual aids, a projector for displaying opaque subject matter on a screen, e.g. the pages of a book

在视听教具中，一种投影仪，用于在屏幕上显示不透明的内容，如书页。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。