don't ask, don't tell
A policy of the U.S. military from 1993 to 2011, which barred openly gay, lesbian, or bisexual people from serving in the military, while also barring discrimination against closeted gays, lesbians, and bisexuals.
(by extension, often humorous) Applied to various other policies that prohibit a behavior but also discourage investigation of it.

学英语单词
acid pressure leaching
acid resisting glass cil
Alfaville
arkhangelsks
Arteriae metatarsales dorsales
ascii characters
assess the damages
asymmetrical photodiode
Avalonia
bargaining models
belwys
bhat (india)
bioparental
capclothes
centered tie
cerebrovascular hemodynamics
chestnut (coal)
coach-of-the-year
coastal survey
coefficient of pth order
commissaires
composite fiber
convolution array synthesis
cordeau
correction for pull
cowerd
crt inquiry display
daphs
deaf aid
dichloroamethoperin
disvelop
duckro
dysfibrinogenemic
efficiency apartments
electrophoration
emetine hydrochloride
endothrix spore
erck
fellow-guest
forecabins
Fosfocreatin
fruit crops
graduated scale
grey-tone response
hand decoration
harshest
hierarchical-naming system
homogeneous symmetrical expression
hussher
in deep remorse
Inspector Javert
instable slope
Itori
junonia orithya
lack of communication
man of substance
maneuverer
market-clearing wage
microsociologist
Middleback, Range
miss school
multiple spot welder
neoclausenamide
nested sampling
network law
Neubeuern
osteoporosis-related
paging-in
paraminyl maleate
Parsteiner See
pentnucleotide
periodic test signal
Periston-N
Pilea longicaulis
plan of action
plano
plazuela
pre emptor
principle of detailed balance
reduced Planck constant
redweeds
regressive combustion
signal locking
solite
speed-tolerant recording
spur-gear cutter
starting 1oad
steam-driven excavator
sugaries
t-headed bolt
telmo
temperature coefficient of permeability
thuns
tipsifies
to be of benefit
Ukhdūd
unilinearly
vincosidelactam
virtual cluster
wave-cut plain
wide frequency band device