They can change from clear to dark and black again when people touch them.

人们触摸时，它们会从透明变成深色，再变成黑色。

youdao

I discovered that a touch of corn syrup was the secret to creating a glossy, dark chocolate top.

我发现一丁点儿的玉米糖浆是创造出光滑黑巧克力顶层的秘诀。

youdao

The result is a deliciously clever book, full of dark insight and even a touch of hope. Mr Ross dedicates the book to his wife, after all.

最终的结果是一本饶有趣味，构思精巧的书籍，对黑暗面富于洞见，在其中也透出一丝丝希望之光——毕竟，罗斯是将此书献给他的妻子。

youdao

The Storm2's dimensions are about the same as before, but it looks a bit sleeker, thanks to details like a ring of dark chrome around the touch-screen.

FORBES: Mobile

The album art is moody and dark, per requirements, though a touch less ominous-looking than what you find on many other covers: what might be a couch under a sheet sits in the middle of a forest rendered in shades of light green and brown.

NEWYORKER: The Dark Arts

Nope, and that adds a special element to The Dark Knight Rises that no other films on this list can touch.

FORBES: The New Top 20 Best Comic Book Superhero Films Of All Time - Revised Edition