hard

• He industriously engages in unostentatious hard work ...
  埋头苦干。
• Working too hard is a drain on his strength ..
  过分辛劳使他精力衰竭。
• We must take a hard look at our finances .
  我们应该密切注意财务问题。
• It was hard indeed , but he made it .
  难是难些，不过他还是成功了。
• It 's still hard to tell who will emerge victorious .
  鹿死谁手尚难料。
• They're not the hardest people to serve .
  他们可不是最难服侍的人。
• By feeling we tell what is hard from what is soft .
  凭感触分辨软与硬。
• Sir, in my early years i read very hard .
  先生，我年青时读书非常刻苦。
• The lighter was hard to get going in the wind .
  打火机在风中很难打着。