lanthanide contraction是什么意思

lanthanide contraction是什么意思 《Synthesis and characterization of lanthanide hydroxide single-crystal nanowires》 这句话对么?后面的是同位语么The rare-earth metal dysprosium is a member of the lanthanide series,it is in group IIIb of the perodic table. 英语翻译Stable Lanthanide Luminescence Agents Highly Emissive in AqueousSolution:Multidentate 2-Hydroxyisophthalamide Complexes ofSm3+,Eu3+,Tb3+,Dy3+正文：Applications such as high throughput assays (drug development,genomic screening,and clin