In general, safety of at-grade intersections would be improved by making clear the road right, reducing driving speed and providing enough visual distance.
提出了交叉口安全保障的一般措施，并具体介绍了明确路权、降低车辆行驶速度和增加交叉口行车视距的方法。
This essay points out that the minimum visual distance and the facade whole proportion control the visual effect of the Chinese ancient storied building facade.
该文揭示了中国古代楼阁建筑立面的视觉效果，由立面整体视觉最小视距及立面总体高宽比所控制。
In modern distance education, the multi media classroom in two-way audio-visual distance instruction is a major equipment to carry out the two-way distance instruction.
在开展现代远程教育中，视听双向远程教学多媒体教室（以下简称：视听双向教室）是实现远程双向教学的重要设施。
The observation lens is the single-tube visual lens, eyeglass is made of a concave lens, and the inner part of a lens tube is provided with a visual distance increasing device.
所述的观测镜是单筒目视镜，目镜用凹透镜制成，镜筒内部设有视距增长装置。
The observation lens is the single-tube visual lens, eyeglass is made of a concave lens, and the inner part of a lens tube is provided with a visual distance increasing device.
所述的观测镜是单筒目视镜，目镜用凹透镜制成，镜筒内部设有视距增长装置。
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