费力的

This exhausting work is enough to run everyone down.

这项费力的工作足以使人精疲力竭。

Bringing up a handicapped child can be a long and hard road.

养大儿童是件十分费时费力的事情。

Nobody was keen to take on such a thankless task.

有人愿意承担这种费力不讨好的任务。

Lisa ran her forefinger along the seam of her duffel bag, its microfield sealing up behind as if she had touched it with a magic wand.

丽莎的食指在帆布包的开口缓缓划过。微场密封条仿佛在魔棒的指挥下随着手指下滑动。她费力的提起了背包，嘴里轻轻的哼了。

You can see problems that aren't appear in a double-spaced Courier typescript. ( Yes, you could do this in the old days on galley proofs, but that was an expensive luxury for most writers).

（错，以前在毛条校样时也能发现问题，但是这对于大多数作家来说，是费力不讨好的）。