protection for sb 保护

protest against sth 抗议

against sth provision for/against 准备

pull at/on sth 拉,拖

ratio of sth to sth 比率

reaction to 对……的反应

reason for 原因,理由

reference to 提及,参考

regard for 对……的注意,尊重

remedy for 补救,解决

reply to sb/sth 对……的回答

reputation for 名声,名气

request for sth 要求

research on/into 对……的研究,调查

resistance to 对……的抵抗,阻力

response to 对……的回答,反应

responsibility for 责任,负责

restrainst on sb/sth 限制,约束

search for 对……的搜寻

service to 服务,贡献

similarity between ……的相似之处

skill at 技巧,熟练

solution to ……的解决办法

sorrow at/for/over 悲哀,悲痛

stress on 对……的强调