The room was lit by only the one light.

这个房间只有这一盏灯照明。

《柯林斯英汉双解大词典》

Let's think beyond light pollution; that's only one kind of a technological advance that has interfered with astronomical research.

让我们想想光污染以外的问题，那只是一种科技进步为天文研究带来的不便。

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This fascinating experiment showed that plants not only detect and react to specific wavelengths of light, plants can also detect and react to changes in the ratio of one wavelength to another.

这个有趣的实验表明，植物不仅能探测和对特定波长的光产生反应，还能探测不同波长比率的变化并对其做出反应。

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They complain that even the small hydroelectric plant being built nearby will light only one light bulb per household here.

NPR: Teams Focus on Poppy Eradication in Afghanistan

One ray of light: Only 4% said it is simply difficult to place anyone who is unemployed, no matter what the duration.

FORBES: New Study: Long-Term Unemployment Viewed By Hiring Companies As Worse Than A Criminal Record

Yet when one considers the need for affordable energy to power our homes and light our factories, only one plan stands a greater chance of success of securing our energy future.

FORBES: Which Candidate's Energy Plan is Better for America?