Number of different species: 50, 000 in the light zone of the ocean alone.

不同种类数量：仅在海洋光区就有50 000。

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The early warning signal system of unemployment is based on the level of unemployment cordon, in different "light zone" has the appropriate contingency plans for the unemployed;

失业预警信号灯系统是根据失业警戒线的层次划分建立起来的，在不同的“灯区”有相应的失业应急预案；

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According to the demands of crop and livestock for sunlight illumination condition, 4 zones, namely, dark light zone, weak light zone, moderate light zone and strong light zone were divided.

探索了汽车在可见度极差的条件下行驶，由于光照暗区带来的一系列不安全因素的解决方法。

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Up to now, the Internet has been a light-touch regulatory zone, and free-market advocates have argued that its success depends on an approach that is largely hands-off.

FORBES

It stayed away from a high pressure zone with light winds off Nova Scotia, and built up a big enough lead to withstand the challenge from Silk Cut which was in the right place to benefit from the conditions in the second half of the leg.

BBC: Leg Eight: Toshiba snatches victory

The core area and buffer zone have only light infrastructure dedicated to research, public use, institutional events and surveillance activities.

UNESCO: EDUCATION