To convince someone of the truth, it is not enough to state it, but rather it must be found.
要说服某人相信真理,仅仅陈述它是不够的,它必须被发现。
一个试图教学而不激发学生学习欲望的教师,就像在冷铁上敲打。
可持续性不是选择,而是我们对后代的责任。