The preparation process includes the following steps: 1. preparing copolymer with monomer containing unsaturated double bond in 20-50 wt% and carboxyl radical-containing monomer in 5-20 wt%;

包括以下步骤：（1）由重量百分比20％-50％的含不饱和双键的单体 和重量百分比5％-20％的含羧酸基的单体发生聚合反应制备共聚物；

youdao

In a Commons statement on 26 July 2010, Home Secretary Theresa May claimed plans for electing police commissioners and replacing the Serious Organised Crime Agency (Soca) with a national crime-fighting force represented "the most radical reforms to policing in at least 50 years".

BBC: Johnson slams 'unnecessary' policing reforms

In the weeks before new BOJ governor Haruhiko Kuroda took office promising a radical new approach to battling deflation, the Nikkei soared nearly 50% since mid-November, mainly in anticipation of the new action.

WSJ: Japan's Mrs. Watanabe Decides It's Time to Buy Stocks

This is not such a radical thing to achieve since psychological interventions have been shown to be efficacious over placebo for 50 years.

FORBES: There Are No Silver-Bullets in Education Reform