Allen's law

例句：

1. 1. The law of gravity states that objects fall towards the center of the Earth.
   重力定律表明，物体会向地球的中心下落。
2. 2. The Allen's law was a significant contribution to the field of quantum mechanics.
   艾伦定律是量子力学领域的一个重要贡献。
3. 3. In the case of Allen's law, it is important to consider both sides of the argument before making a decision.
   在艾伦定律的案例中，在做出决定之前，需要考虑论点的两面性。