The problem about mechanical efficiency of tackle-block is the key point in junior high school mechanics and also the difficult point.
滑轮组机械效率问题是初中力学中的重点，也是初中力学解题的难点。
A simple tactic: pick one half-hour block each day in which to tackle all of the small, non-academic tasks that need to get done. Right before or after dinner is a good time.
提供一条简单的策略，每天抽一个半小时时间用来处理这类非学科类但必须完成的小任务，而晚饭前后是个好时机。
The game of life is a lot like football. You have to tackle your problems, block your fears, and score your points when you get the opportunity.
人生的竞赛很像橄榄球赛，你必须解决你的问题，挡住你的恐惧，并在机会出现时得分。
The game of life is a lot like football. You have to tackle your problems, block your fears, and score your points when you get the opportunity.
人生的竞赛很像橄榄球赛，你必须解决你的问题，挡住你的恐惧，并在机会出现时得分。
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