Another approach is to put electrodes on the scalp, but the signals aren't very clear because they must pass through skin and bone.

另一种方法是在头皮上分布电极，但是由于信号必须穿透皮肤和头骨，信号不是很清晰。

youdao

One of the Polish students was Klara, about 24, rather small, with the classic Slavic look: clear skin, good cheekbones, a pouty mouth, and a slyness in her blue eyes.

学生里有个波兰来的女生叫克拉拉，大约24岁，身材娇小，典型的斯拉夫相貌：皮肤白皙，颧骨优美，嘴巴翘着，蓝眼睛里带一丝狡黠。

youdao

I have left the clinic feeling incredibly well, with shiny hair and clear skin and a spring in my step.

每次离开诊所我都难以置信地感觉良好，头发光泽、皮肤洁净、步伐矫健。

youdao

Health Secretary Andy Burnham said the scientific evidence of harm to skin and the link to skin cancer was clear.

BBC: Government and Girls Aloud star back under-18 tan ban

Drinking raw milk, they say, confers numerous health benefits vitality, digestive vigor, strong teeth, clear skin and even has the power to treat serious ailments, such as diabetes, cancer, and autism.

NEWYORKER: Raw Deal

The origin of this belief in Africa is not clear, but researchers have linked it to Africa's colonial history where white skin was the epitome of beauty.

BBC: Africa: Where black is not really beautiful