stable element meaning in English

回转方位水平仪
稳定元件
稳定元素

Models of element synthesis during the supernova explosions predict that the abundance ratios of actinides with respect to other stable elements heavier than iron are very sensitive to the environment of the explosion , such as the entropy and the ratios of protons , neutrons and electrons
模型元素的合成,在超新星爆炸预言的丰度比锕对于其他稳定更重的元素,比铁很敏感,对环境造成的爆炸,如熵和比例的质子,中子和电子