The horizontal separation between the limits of instrument (in clouds) flight airspace and those of the airways, air corridors and other airspace shall not be less than 10 kilometres.

仪表（云中）飞行空域的边界距离航路、空中走廊以及其他空域的边界，均不得小于10公里。

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A usually adjustable opening in an optical instrument, such as a camera or a telescope, that limits the amount of light passing through a lens or onto a mirror.

光学仪器上的一个可调开口，如照相机或望远镜，它控制穿过镜头的或到镜面的光的数量。

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In the thesis, it has been discussed detailedly about the main research methods, instrument and its application limits in the reservoir geological modeling.

论文详细讨论了储层地质模型的主要研究方法、研究手段和应用局限。

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He is also almost single-handedly responsible for transforming the guitar, formerly the junior partner of the flamenco trinity, into an instrument of solo expression far beyond traditional limits.

BBC: I came here to learn flamenco

This Convention, which is probably the most universal legislative instrument in the field of cultural heritage today, strengthened the identification of cultural heritage as tangible heritage since it limits its scope to monuments, groups of buildings and sites, all instances of tangible heritage.

UNESCO: Intangible Cultural Heritage