That was news to me—I would need to find another way to structure my daily existence.

For these reasons I think physical books will have a longer existence as a commercial product than some currently predict.

A search is now under way to confirm the suspected existence of particles of matter that move at a speed greater than light, and therefore, might serve as our passports to the past.

That was news to me — I would need to find another way to structure my daily existence.

According to Mark Saul, the director of competitions for the Mathematical Association of America, not a single African-American or Hispanic student—and only a handful of girls—has ever made it to the Math Olympiad team in its 50 years of existence.

It had, apparently, been fished out of existence; and the once mighty Newfoundland fleet now gropes about frantically for crab on the sea floor.

Researchers recently found kimberlite ( ' , 金伯利巖) deposits hinting at the existence of diamonds.

Advertising informs consumers about the existence and benefits ofproducts and services and attempts to persuade them to buy them.

They pose a serious challenge to future human existence.

What does the man say threatens the existence of railways?

According to Mark Saul, the director of competitions for the Mathematical Association of America, not a single African-American or hispanic student—and only a handful of girls—has ever made it to the Math Olympiad team in its 50 years of existence.

Because if we aren't, we won't be providing much value in future ecosystems, and that may put in question the foundation for our existence.

Researchers recently found kimberlite(金伯利巖) deposits hinting at the existence of diamonds.

The 28 existence of such ideals, without the tempering of the reality of a job or profession, rapidly leads adolescents to become 29 intolerant of the non-idealistic world and to press for reform in a characteristically adolescent way.

They lack water-storing structures, and their existence on rock faces prevents them from tapping groundwater, so they have instead developed the ability to change their metabolism.