So in order to move your hand through water which is a much heavier medium than air, it will require more strength - to do that over time requires endurance of your arm muscles.
就像在第一点提到的，这要根据你的划水频率和在水里移动手臂的能力决定，牵涉到力量和耐力。 因为水的密度比空气大很多，不断地划水需要你手臂肌肉很好的耐力。
For great power always belonged to thee alone: and who shall resist the strength of thy arm?
你随时可用你的大能，有谁能抵抗你有力的手臂？
When the box section design boom and a reasonable cross-section are put in danger of partial reinforcement, the arm can have good stiffness, strength, vibration stability.
当箱型臂截面设计合理且在危险截面处实施局部补强后，可使臂架具有良好的刚度，强度，振动稳定性。
The result is identical with practical life, which can be used for the working arm fatigue strength assessment and the improvement of structure.
预测结果与实际使用寿命取得一致，为动臂疲劳强度评估及结构改进提供了依据。
If practicing frequently, one can increase the power of arm and wrist, and use its own strength freely.
常习练此棍术，可以增强臂腕之力：增强全身之整劲的收放自如程度。
The LORD hath sworn by his right hand, and by the arm of his strength, Surely I will no more give thy corn to be meat for thine enemies;
耶和华指着自己的右手和大能的膀臂起誓，说，我必不再将你的五谷给你的仇敌作食物，外邦人也不再喝你劳碌得来的新酒。
The LORD hath sworn by his right hand, and by the arm of his strength, Surely I will no more give thy corn to be meat for thine enemies;
耶和华指着自己的右手和大能的膀臂起誓，说，我必不再将你的五谷给你的仇敌作食物，外邦人也不再喝你劳碌得来的新酒。
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