中国黄金要成为世界一流的矿业公司。
在观察性研究中,我们常常不得不依赖于无法直接检验的假设。
所有事物都是由土和水生成和成长的。
Anxiety is essential to the human condition. The confrontation with anxiety can relieve us from boredom, sharpen the sensitivity and assure the presence of tension that is necessary to preserve human existence.