the boundaries of the country
the boundaries of knowledge
the boundary between sanity and insanity
The boundary questions still remain unsettled.
Here the boundary jogs south.
The river is the boundary between the two countries.
a boundary that ranges from A to B
Compared to supersequence boundaries, the depositional hiatus at sequence boundaries is shorter and sequence boundaries are not compatible with lithostratigraphic unit boundaries.
lava issuing from the brim of the crater. See also Synonyms at boundary
从火山口流出的熔岩 参见同义词 boundary
the river marks the boundary between the two regions.
the boundary where agnosticism ends and atheism begins.
There are no indecisive boundaries between the two opinions.
The boundaries of that country were changed by a treaty.
The boundaries are clearly marked off on the map.
the sawtooth austenite boundaries become preferential nucleation sites of ferrite, and the sawtoothed ferrite boundaries contribute to the formation of ferrite recrystallization nucleus.
his novels blur the boundaries between criticism and fiction.
statesmen must be cognizant of the political boundaries within which they work.