相关单词近义词 strengthen 加强, harden (使)变硬, build up 建立, reinforce 加固, fortify 加强, shore up 支撑, beef up 加强, firm up 巩固, acclimate 使习惯于新环境..., steel 钢铁临近词toupee, tough, toughener, toughening, toughen up, Toughened ABS, toughened wax, toughening oil, Toughened HDPE, toughened paper, toughened glass, toughened degree 返回 toughens