【释义】：父亲不慈爱，子女就不会孝顺；兄长不友爱，弟弟便不会恭敬。
我认为不断挑战自己，不要让自己太舒服是很重要的。
这类波可以像光波一样被反射、折射和偏振。
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.
