toil at

• v. 苦干

toil at的用法和样例：

例句

1. After toiling at the article for weeks, she suddenly found the right way to organize it.
   在这篇文章上她煞费苦心达数周之久后，突然间灵机一动找到了布局的方法。
2. The summer dragged its slow length along, while the slaves toiled at their hard tasks.
   夏天过得十分缓慢，而奴隶们却辛苦地做着苦工。