n.
the complete duration of something
"the job was finished in the span of an hour"
the distance or interval between two points
two items of the same kind
同义词：couplepairtwosometwainbraceyokecoupletdistichduoduetdyadduad
a unit of length based on the width of the expanded human hand (usually taken as 9 inches)
a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.
同义词：bridge
the act of sitting or standing astride
同义词：straddle
The Ecology of Leaf Life Spans
Inflammatory exposure and historical changes in human life-spans.
ecology of leaf life spans
Time constraints and resource sharing in adults' working memory spans
The major resistance gene cluster in lettuce is highly duplicated and spans several megabases
Automatic identification of cited text spans: a multi-classifier approach over imbalanced dataset
Hadza Women's Time Allocation, Offspring Provisioning, and the Evolution of Long Postmenopausal Life Spans
Isogeometric analysis: CAD, finite elements, NURBS, exact geometry and mesh refinement
Beyond local search: boundary‐spanning, exploration, and impact in the optical disk industry
Coupled cluster theory for high spin, open shell reference wave functions
