For its party piece Cassini dropped a probe called Huygens through the Titan atmosphere onto the hidden surface.

卡西尼号发射惠更斯号探测舱穿过土卫六的大气层降落在土卫六的表面上。

To use Huygens' principle, you first draw a bunch of little points along a wave.

要使用惠更斯原理，首先要 沿着波浪画出一堆小点。

Huygens' Principle says that you can predict a wave's position in the future by analyzing its current position.

惠更斯原理说，你可以通过分析波浪的当前位置来预测未来波浪的位置。

But the part that isn't blocked keeps moving past the edge, and it follows Huygens' principle, forming wavelets.

但是没有被阻挡的部分会一直移动到边缘之外，它遵循惠更斯原理，形成小波。

One of the most important reasons that light acts the way it does is known as Huygens' Principle.

光以它的方式起作用的最重要原因之一被称为惠更斯原理。

Dragonfly will live in the Titan environment, where, so far, our only close-up view is this image the Huygens probe took in January 2005.

蜻蜓将生活在土卫六的环境中， 到目前为止，我们唯一的近距离观察是惠更斯号探测器在 2005 年 1 月拍摄的这张照片。