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поддерживать план stresses
gen.	give countenance to a plan
busin.	back a plan
dipl.	lend countenance to a plan
Makarov.	confirm a plan; defend а plan; endorse a plan; favour a plan; be in favour of a plan; defend a plan; promote a plan; sponsor a plan; support a plan
media.	buttress a plan (bigmaxus); favor a plan (bigmaxus)
поддерживать чей-л. план
gen.	favour smb.'s plan (the proposal, the scheme, a progressive policy, etc., и т.д.)

поддерживать план: 5 phrases in 3 subjects

General	2
Makarov	1
Mass media	2