A people without children would face a hopeless future; a country without trees would face a future with even less hope.
没有孩子的民族将面临无望的未来；没有树木的国家将面临更加无望的未来。
In a time of universal deceit, telling the truth is a revolutionary act.
The pursuit of knowledge is a journey without end, but each step brings its own rewards.
"Always be prepared for the unexpected."
The probability of a response is determined by its reinforcement history.