In aere piscare, & in mari venari, proverbialiter.
http://lila-erc.eu/data/lexicalResources/LatinPortuguese/Velez/id/UsageExample/n0171.sg01.s99.u01 <http://www.w3.org/ns/lemon/lexicog#UsageExample>
In aere piscare, & in mari venari, proverbialiter.
i, frustra moliri,
In aere piscare, & in mari venari, proverbialiter,
trabalhar de balde.