只给痛苦症状显著上升的一组使用了浓度是0.5%的丙美卡因氢氯化物，但使用后，这组也只有55%的人感到疼痛有所缓解。

The only group with significant symptomatic improvement in pain received proparacaine hydrochloride 0.5%-and only 55% had decreased pain with treatment.

youdao

只给痛苦症状显著上升的一组使用了浓度是0.5%的丙美卡因氢氯化物，但使用后，这组也只有55%的人感到疼痛有所缓解。

The only group with significant symptomatic improvement in pain received proparacaine hydrochloride 0.5%-and only 55% had decreased pain with treatment.

youdao