a light at the bottom (底部). It's green when all is well and turns red if it is too dry, hot or cold, or if it's too light or dark. ……

Keeping Your Head UpBirdyEnglish singer-songwriter Birdy just debuted her first single from her upcoming album Beautiful Lies. The song is about finding a light in the dark and staying strong when ……

以假乱真的艺术：巧克力皮鞋。 This pair of shoes looks classy (漂亮的). But you don’t want to wear them － they are made of chocolate. The shoes come in three different shades (色调) of brown leather (皮革) － light, dark ……

is the story about?AL: The story is set 1,000 years ago. There was a war between the Light and Dark. The Light won but it didn't destroy the Dark. The power of the Light was placed in six different ……

different types of objects: dark shapes on a light background; light shapes on a dark background; and both light and dark shapes on a gray background.Humans see through two channels: neurons sensitive ……

) of brown leather (皮革) – light, dark and red-brown – and have a shiny look.Each pair of life-size ……

) of brown leather (皮革) – light, dark and red-brown – and have a shiny look.Each pair of life-size ……

are in many ways the same as our neighbours, near and far. It can bring light to the dark places ……

, melatonin reduces. This light-dark cycle is good for our health.But if people charge their phones when they are asleep, the phones release short-wavelength (短波长) blue light. Although it is not bright enough ……

evolved in a very regular light-dark cycle, and our bodies just work better that way.”Researchers have....In the past, people slept more in winter, but in modern times we just use more electric light instead ……

between the forces of Light and Dark. He comes into possession of a device that can restore life... of the same name. It tells the story of a man who serves in a war between the forces of Light and Dark ……

, that, in light of dark wizard Lord Voldemort's return, "we are all facing dark and difficult times." For Harry ……

. It is hard for astronauts to get used to this light-dark cycle when they sleep. Also, they need to sleep... sleeping pods (分离仓) that help shut out some of the light. Still, studies have found that most ……

bonesHere’s to our future, here’s to our bonesI’ll be the light in the dark if you fade, want a glimmer of hopeI’ll be the light in the dark if you fade, want a glimmer of hopeHere’s to our future ……

/dark cycle,” says Figueiro.In addition, the schools are likely not providing enough electric light... of the right light in the morning can make it difficult for teenagers to reset their body clocks ……