可减少的

Using the syntan to pretan vegetable-tanned sole leather ,the quantity of tannin extract can be reduced in vegetable tanning.

该剂用于植底革的预,可减少植时栲胶的用量。

Several clinical investigations demonstrated that intravitreous injection of plasmin before vitrectomy could reduce the risk of retinal bleeding or detachment.

不少临床研究表明:手术前,以少量纤溶酶降解玻璃体视膜连接处蛋白质,可明显减少手术引起的视膜出血、脱离等并发症。