测定 determine; determination; setting-out; admeasurement; assignment; assay; finding 测定年代 dating; 测定尺寸 size up; 测定船只方位 take a ship's bearings; 放射性碳素测定年代 radiocarbon dating; 矿石中含铁量的测定 the determination of the amount of iron in ore; 示踪测定 tracer determination