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。
Oxygen and strontium isotopes, which are fixed in dental enamel at the time of tooth formation, were tested in 18 subjects.
径向引线固定电感器，在铁氧体磁芯上单层或多层绕线，环氧树造脂包封，包装形式可以编带也可袋装。
Radial lead coil, single or multi-layer winding on ferrite core, coating by epoxy resin. Products can be taped or packed in viny bangs.
终于，氢渐渐地被固定在金属内部的“陷阱”中而导致氧脆。
Eventually hydrogen becomes fixed in traps in the metal, leading to hydrogen embrittlement.
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