strontium

Others decay more slowly, like some cesium, iodine, strontium, and argon.

剩下的一些延迟消退的很慢，比如铯、碘、锶和氩。

Lee-Thorp and her colleagues measured the levels of two isotopes of strontium, an element found in soil.

李.索普和她的同事测量两种锶同位素的等级，一种从土壤中发现的元素。

Oxygen and strontium isotopes, which are fixed in dental enamel at the time of tooth formation, were tested in 18 subjects.

在18件样本上检测了氧和锶的同位素。 这两种元素在牙齿成型时，会固定在牙釉质上。