Definition: to become stronger or make something become stronger Level: B2
定期锻炼可以增强你的腿部肌肉。
Regular exercises can ___strengthen your leg muscles.
这次经历只是加强了他对上帝的信仰。
The experience only ___strengthened his belief in God.
日常锻炼有助于增强你的肌肉。
Daily exercise helps to ___strengthen your muscles.
