The problem of testing statistical hypotheses is an old one, and its origins are obscure.
检验统计假设的问题由来已久，其起源已不可考。
The elements of consciousness are to be isolated by experimental procedures.
真相是，我们都是流亡者。
可持续的做法不是成本，而是对我们共同未来的投资。
A tree is a symbol of hope—rooted in the present, reaching for the future.
Sustainability is not an option anymore; it's a necessity for the future of agriculture.
拖延乃光阴之窃贼。
可持续性不仅仅是一个流行词；它是我们对后代的责任。