意思是困难的、努力地，例如：
1、Some people will gain weight, no matter how hard they try to slim.有些人无论多么努力地减肥，都会长肉。
2、He strives hard to keep himself very fit.他努力地保持身体健康。
3、She made a resolution to study English harder at school.她下定决心要在学校更加努力地学习英语。
水利万物而不争,
而万物莫能与之争。
