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| acid test; touchstone (There is a danger that Moscow looks set to make the issue of ballistic missile defence a touch-stone for its broader relationship with Washington. BBC Alexander Demidov); proxy ("Sberbank, the lender some investors see as a proxy for the country's financial industry" – Bloomberg ridge69) | |||
| litmus test (Bullfinch); characteristic feature (Damirules) | |||
| ribbon (Recognition is a ribbon that helps us identify and replicate innovations... Anastasiya Lyaskovets) | |||
| acid-test ratio; quick ratio | |||
| litmus paper | |||
| лакмусовая бумажка: 2 phrases in 2 subjects |
| Chemistry | 1 |
| General | 1 |