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。

I finally hoisted him up with a block and tackle.

我最终用滑轮组把他拉了上去。

I finally hoisted him up with a block and tackle.

我最终用滑轮组把他吊了上去。

The drilling line is reeled over the crown block and traveling block to gain mechanical advantage in a "block and tackle" or "pulley" fashion.

钻井用钢丝绳通过天车和游动滑车以滑轮组的形式获得机械上效益。

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。