Basedg on Fourier optical principle, the imaging property of grating illuminated by expansion source is analysed in this paper. Hence an innovative grating imaging displacement sensor is designed.

该文应用傅里叶光学原理对扩展光源照明下光栅的成象特性作了分析，并由此设计出一种新型的光栅成象型位移传感器。

youdao

To achieve the economic expansion we all seek, we need to unlock a vital source of growth that can power our economies in the decades to come.

为实现我们所寻求的经济增长，我们需要开启一个能使我们的经济在未来数十年中获得动力的必不可少的增长源泉。

youdao

From this point of view these flat Spaces around us turn out to be one possible source of dark energy for the accelerating expansion of the Universe.

从这个角度看，我们周围的这些平面空间可能是暗能量的一个来源，而正是它让宇宙加速膨胀。

youdao

Furthermore,Mr.Netanyahu has said he supports the expansion of Jewish settlements in the West Bank - a source of enormous tension between Israelis and Palestinians.

VOA: standard.2009.04.09

Some say the company is overvalued, but others note it still has options like international expansion that could be a source of more growth.

WSJ: Lululemon's Secret Sauce

The surprising source of Belfast's expansion is Aer Lingus, Ireland's national airline for 70 years until it was privatised in 2006 and still, for many, a potent symbol of national identity.

ECONOMIST: A row over routes is re-stoking north-south rivalries

As the chart shows, business investment has been the prime source of growth during America's expansion.

ECONOMIST: Bear necessities