impractically造句怎麼寫

A scroll is of course one long piece of paper or some other writing material that is impractically shaped for keeping flat.

Until now, most approaches relied on impractically scarce materials like iridium as a catalyst that triggers the reaction.

Scientists now use them to measure the climate in areas that would have been impractically small when sensors were more costly-say under individual plants rather than in a thicket.