Because I tried that approach and wasted hours getting it right, and it was slow!

因为我试过那种方法，为了得到正确的方法，浪费了好多个小时的时间，而且它并不快！

youdao

Unfortunately, it is chock full of technical errors. I have wasted hours trying to get the examples to work.

很不幸，书中布满了技术错误。我花费许多时间尝试让例子正常运行。

youdao

You might also be able to work from home some of the time, which would let you avoid wasted hours commuting back and forth.

你或许某些时候还能在家里工作，那会让你免去往返于上下班路上所浪费的时间。

youdao

These are the impediments to the movement of people and goods brought on by Sept. 11: the wasted hours of employees showing IDs to get into their building, the delays at the airport, the backlog of trucks at the border, the increased cost of air freight, the dead weight of higher insurance premiums.

FORBES: The Detour Economy

These are the impediments to the movement of people and goods brought on by Sept. 11: the wasted hours of employees showing proof of identification to get in their building, the delays at the airport, the backlog of trucks at the border, the increased cost of air freight, the dead weight of higher insurance premiums.

FORBES: The Detour Economy

The computer has cut the number of wasted worker hours by 33%.

FORBES: Hurry Up And Wait