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    1. strengthen

      英 ['stre?θ(?)n; -?kθ(?)n] 美['str??θn]
      • vt. 加強(qiáng);鞏固
      • vi. 變強(qiáng);變堅(jiān)挺

      英英釋意


      1. make strong or stronger;
      "This exercise will strengthen your upper body"
      "strenghten the relations between the two countries"
      2. gain strength;
      "His body strengthened"
      3. give a healthy elasticity to;
      "Let's tone our muscles"