baselines

n.

an imaginary line or standard by which things are measured or compared

"the established a baseline for the budget"

the back line bounding each end of a tennis or handball court; when serving the server must not step over this line

同义词：service line

the lines a baseball player must follow while running the bases

A New Baselines for Image Annotation
Baselines and Degradation of Coral Reefs in the Northern Line Islands
Baselines and bigrams: simple, good sentiment and topic classification
Shifting baselines, local impacts, and global change on coral reefs.
Shifting baselines and the decline of pelagic sharks in the Gulf of Mexico
Sliding Baselines, Ghosts, and Reduced Expectations in Kelp Forest Communities
Return to Neverland : Shifting Baselines Affect Eutrophication Restoration Targets
Aperture synthesis with a nonregular distribution of interferometer baselines
Carrier phase ambiguity resolution for the Global Positioning System applied to geodetic baselines up to 2000 km
Carrier Phase Ambiguity Resolution for the Global Positioning System Applied to Geodetic Baselines up to 2000 km. Journal of Geophys...