The thoughtful reader might propose the change of the electron as an obvious candidate for the third natural unit. 善于动脑筋的读者，可能提出电子的电荷作为第三个自然单位的明显的候补者。
A deeper understanding of submicroscopic nature awaits the discovery of another natural unit, possibly a fundamental length. 对亚微观世界进一步的了解，可望发现另一个自然单位，这可能是一个基本长度。
