They're all happily following the on-stage action, apparently oblivious to the bizarre optical illusion taking place before their very eyes.
他们开心地看着舞台上的表演，显然，面对这些光怪陆离的幻觉，你已经快疯了，他们无所谓。
2
They offer clearer and sharper images. Many of them also have up to 20x optical zoom lens, a photo mode and fast-action mode.
它们的画质更加清晰分明。其审很多款产品带有高达20倍的光学变焦镜头，并且有照相模式和速拍模式。
3
The result shows that the optical thickness of the west of Bohai sea region is influenced by both Bohai sea and human action, and each wave band's optical thickness is big.