To signal an emergency， use the rule of three； 3 shouts， 3 horn blasts， or 3 whistles.

The body is a landscape of pain and beauty.

Reading is a form of prayer, a guided meditation that momentarily makes us believe we're someone else.

The only way to predict the future is to create it.

高分子科学的进步依赖于理论与实验的结合。