The ocean is not just a source of food, but a vital part of our planet's ecosystem that we must protect for future generations.
The strictness of Russian laws is softened by the non-obligatory nature of their execution.
"The past is always tense, the future perfect."
开放的社会、对知识的无限制获取、人们为推进知识而进行的无计划和无拘束的联合——这些可能使一个庞大、复杂、不断增长、日益专业化和技术化的世界,仍然是一个人类共同体的世界。