a.

1. 費力的，吃力的
   Checking all the names was a slow, laborious job.

   核對全部名字是件既慢又費勁的事。

2. 勤勉的
   Ants and bees are laborious insects.

   螞蟻與蜜蜂是勤勞的昆蟲。

3. 牽強的；生硬的
   His books are written in a laborious style.

   他寫書文筆艱澀。

adj.