亲代投资是理解两性交配策略差异的关键。
Innovation in design is not just about aesthetics; it's about creating pieces that resonate with people's lives and stand the test of time.
Sustainable development is not a choice, but a responsibility.
The present state of the system of nature is evidently a resultant of what it was in the preceding moment, and if we conceive of an intelligence which at a given instant comprehends all the relations of the entities of this universe, it could state the respective positions, motions, and general effects of all these entities at any time in the past or future.