復(fù)數(shù)：stepping stones

n.

a stone in a marsh or shallow water that can be stepped on in crossing

any means of advancement

Stepping Stone
Steppingstone
Stepping Stone
The Stepping Stone Model of Population Structure and the Decrease of Genetic Correlation with Distance
Multiscale Stepping-Stone Detection: Detecting Pairs of Jittered Interactive Streams by Exploiting Maximum Tolerable Delay.
Mesenchymal stem cell: keystone of the hematopoietic stem cell niche and a stepping-stone for regenerative medicine.
Multiscale Stepping-Stone Detection: Detecting Pairs of Jittered Interactive Streams by Exploiting Maximum Tolerable Delay
Impact factor: outdated artefact or stepping-stone to journal certification?
Impact factor: outdated artefact or stepping-stone to journal certification?
"Stepping Stone"model of population.
'Stepping stone' model of population
Instrumental activities of daily living: a stepping‐stone towards Alzheimer's disease diagnosis in subjects with mild cognitive imp...
The importance of transport hubs in stepping-stone invasions.